Cloud Mining Without Investment - The List of Cloud Mining Services That Offer Free Bonus for Just Signing Up (with scams alert)

This free cloud mining list will be updated from time to time. Last update: 2018/December/17.
Welcome to report SCAM's in the comment! Free cloud mining list since 2015.

The followings have been verified to pay (check the comments for payment status): EOBOT, Moon Faucets, DonaldCoin(Closed), Faucetminer(Closed), CetoBeto(Closed), FaucetGo(Closed), OXBTC, CloudMinerGame(Scam!), 25Mining(Scam!), Bitzfree, CLDMine(Scam!), TopMine(Scam!), myHASH(Scam!), Hash-Line(Scam!), XMine(Scam!), Multi-Coin (Scam!), Bit Lite(Scam!), Course Mining(Scam!), MineGate(Scam!), RUBMining(Scam!), OverHash(Scam!), MicroMining, MinerFarm, Cloud-Mine, MineCloud(Scam!), Contract-Miner, Elite Mining Club (Scam!), FreeBTCMine(Closing), bits2u
Tips: Use the free bonus to mine Dogecoin if possible as it usually has the lowest withdraw threshold.
Don't invest too much into suspect services! If you want to investment a large amount money into cloud mining, try more trusted services such as Genesis-Mining (use code hl6V5J to get discount of 3 % on all Hashpower packages. New: use code HappyBirthdayGM16 at checkout for 5% discount valid until April 12th at 23:59 GMT(Expired)), HashFlare (10% discount code for any HashFlare contract (valid until 1st of April): HF17BDAY10,Halloween discount! Use code HF17HLWN10ALL on the purchase page to get 10% off all contracts!), OXBTC.

Recomended

1. Bitzfree (Paying!)
Sign up bonus: 20 GH/s
Note: You can increase your GHs easily by hacking other user's and re-invest your mined Bitcoins.
Links: http://miscool.blogspot.com/2015/11/bitzfree-free-bitcoin-cloud-mining.html

2. EOBOT (Paying!)

Sign up bonus:
Note: You can claim at their faucet of about 2000 satoshis (or equivalent worth of GHs) with login bonus 1 DOGE everyday.
Links: http://miscool.blogspot.com/2015/12/eobot-cryptocurrency-mining-made-easy.html

3.MinerFarm (Warning! Withdraw Problem! Paying!)

Sign up bonus: 100 GH/s
Note: This is a virtual mining game - you're not doing real mining but can withdraw real Bitcoin.

4. Moon Faucets (Paying!):
Note: Not cloud mining but faucet sites that you can claim when you want. Your unclaimed satoshi increases more slowly as time goes on.
MoonBitcoin

MoonLitcoin

MoonDogecoin

5. Faucetminer (Closed)

Sign up bonus: 1+ KH/s every 45 minutes.
Note: Another virtual mining game that can mine Dogecoin. Mininum withdraw: 10 DOGE.
Note: After refunded its users, this nice service closed on 25/July/2016.

7. DonaldCoin (Site is Down)

Note: Another popular and reliable free Bitcoin generator game with no minimum and instant payout to FaucetBox.

8. CetoBeto (Paying!Site is for sale.Site closed. Site is back!Closed!)

Note: The new DonaldCoin, free Bitcoin generator game with no minimum and instant payout to FaucetBox.

9. FaucetGo (Paying! Site is Down!)

10. FreeBTCMine (Paying! Closing)

Others

The following are some scam like cloud mining sites with sign up bonus, not recommended to invest unless you trust them. Be warned that many cloud mining services are just Ponzi schemes, for example, cloudminr.io (Read the story here). They all offer sign up bonus but have a high threshold for withdraw and even require deposit before withdraw. Anyway, you can do the mining before/without investment.
You can check the sites below at http://www.badbitcoin.org/thebadlist/index.htm (which comments/lists most of the below sites as scam sites) for scam advises/reviews, and check the paying status at http://www.cmmonitor.com/ and http://cryptomonitor.net/.

7. CryptominingFarm

Sign up bonus: 50 GH/s
Note: Bonus Hashrate is for 15 Years. You need to purchase minimum 20 GH/s before you can withdrawal.

15. OXBTC (Limited time offer! Expiry date: 2016/March/6th20th) Expired.Extended. Expired. (Paying!)

Sign up bonus: 1 GH/s to 1000 GH/s (random)
Note: Bonus is only valid for the first month on signing up (one-month contract).

23. RUBMining (Paying!) SCAM!
Sign up bonus: 1 GH/s

Note: Russian site, use google translate. Need a Payeer address to sign up.

87. bits2u (Paying!)

Sign up bonus: 30 2uhash

96. MicroMining (Paying!)
Sign up bonus: 20000 Satoshi
Note: Need to install their mining software.

113. Contract-Miner (Paying!)

Sign up bonus: Faucet (1 MH/s for every 30 minutes)
Note: Can withdraw through Xapo or FaucetHub, so it has no minimum withdraw threshold. You should claim your earning (Home-> Click "Finalize your contract (Get Paid)" button every 5 minutes as a beginner).

More unverified services:
http://digitalcoin.tk/freemining.html

Confirmed Scam Sites
http://miscool.blogspot.com/2016/08/confirmed-scam-cloud-mining-services.html

Notes on Gridcoin Mining Using Google Cloud Computing

Gridcoin (GRC) is an altcoin that can be mined through contribution to scientific research (PoR - Proof of Research), more specifically, by doing BOINC (Berkley Open Infrastructure for Network Computing) hosted computing work. It makes cryptocurrency mining a more meaningful thing and is very suitable for mining use a VPS such as Google cloud. Different from other cryptocoin mining, you don't need to worry about the violation of TOS as you're running the BOINC computing software instead a miner on the VPS.

The following steps will guide you to mine Gridcoin on Google cloud, which is based on but much simpler than the official tutorial - http://www.gridresearchcorp.com/gridcoin/?tutorial.

1. First follow the official guide to setup both BIONC and Gridcoin wallet on your own (local) computer. Make sure you use BAM! account manager in the tutorial.

2. Sign up for the Google cloud free trial: https://cloud.google.com/free-trial/

3. Follow the official Steps 2-6 to create your google cloud instance.

4. The official tutorial doesn't use an account manage, to simplify the process, I strongly suggest you to use BAM!, so you can skip the official Steps 7 and 8.

5. For official Step 9 - in the SSH terminal enter the following commands, each "$" indicates a single line (if you're using BAM!):

$ sudo apt-get update
$ sudo apt-get install boinc
for each project that you want to run, enter:
$ boinccmd --project_attach PROJECT_URL AUTH_KEY
replacing PROJECT_URL and AUTH_KEY with the values that you gathered in step#8
$ boinccmd --join_acct_mgr http://bam.boincstats.com BAM_ID BAM_Pass
(replacing BAM_ID and BAM_Pass with your BAM! ID and password.)
$ boinccmd --set_run_mode always
$ boinccmd --set_network_mode always

The following commands are useful for monitoring the state of BOINC:

$ boinccmd --get_simple_gui_info
$ boinccmd --get_tasks
$ boinccmd --get_file_transfers

6. Follow the official Steps 10~14.

Other Notes:

1. If you want to change the BIONC projects for Google cloud to run, just manage the projects for Google cloud instance using BAM!, and re-input the command to update the BIONC projects and syncs with BAM!:

$ boinccmd --join_acct_mgr http://bam.boincstats.com BAM_ID BAM_Pass

2. On your personal PC, where your Gridcoin wallet is installed, you should add all the BIONC projects you joined, although you can suspend them locally and only run them on Google cloud for BIONC credits.

References:
http://www.gridresearchcorp.com/gridcoin/?tutorial
https://boinc.berkeley.edu/wiki/Boinccmd_tool
https://gridcoinstats.eu/faucet.php

How to Mine Bytecoin, Monero and Fantomcoin Using Google Cloud Computing Free Trial

Google cloud offers everyone $300 credit for free to spend over the first 60 days on signing up. You'll need a valid credit card for registration but won't be billed during the trail. The following steps will guide you to mine Bytecoin, Monero and Fantomcoin on Google cloud:

1. First register for a MinerGate account using your email.



2. Sign up for the Google cloud free trial: https://cloud.google.com/free-trial/

3. In Google cloud console - https://console.developers.google.com/project, create a new project, and give it a name. You may check the tutorial https://cloud.google.com/compute/docs/linux-quickstart (a video tutorial included) before you go on.

4. Go to your project dashboard - something like "https://console.developers.google.com/compute/instances?project=projectid-web-111612&graph=GCE_CPU&duration=PT1H", add a VM instance by click "NEW INSTANCE" button. Change the "Machine type" to "High CPU machines (n1-highcpu-2, 2 vCPUs, 1.8 GB Memory)", and change "Boot disk" to "Ubuntu 14.04 LTS (amd64 trusty image built on 2015-09-09)". For the "Firewall", tick both "Allow HTTP traffic" and "Allow HTTPS traffic". Then click "Create".

5. Find you created instance, click "ssh", "Open in Browser Window".

6. Now, in the console, input (you can ctrl+c and then ctrl+v into the web terminal) the following three command lines (one line + enter key, each time):

wget https://minergate.com/download/deb-cli
sudo dpkg -i deb-cli
nohup minergate-cli -user youremail -bcn 2 -fcn+xmr 2

where you should replace "youremail" with your MinerGate account email.

7. Now you can close the ssh browser window. Check your instance's CPU usage, which should be about 100%.

8. You can repeat the above steps to get more instances (You can also create a "Snapshots" of your VM instance just created and duplicated it to get more instances).

9. Now you can just let your project running for the whole trial period. Don't need to worry about your credit card being charged as according to google's FAQ, your projects will be paused automatically when your trial credits run out and you won't be charged unless you upgrade your trial account to paid account.

Warning: This tutorial is for demonstration purpose only. Use google cloud for cryptocurrency mining only may be a violation of its TOS and may result in your google cloud account being suspended (Although this has not been confirmed as their terms of service is vague about this). Try at your own risk! If you're worrying about that, you can safely delete your newly created computing project now.

FAQs:

Why Bytecoin and Monero?
As is known to all, nowadays it is not profitable anymore to CPU mine most cryptocurrencies, such as Bitcoin or Litcoin. This page (http://cpucoinlist.com/) listed some altcoins that are still suitable for CPU mining, in which Bytecoin and Monero are the most popular two according to the cryptocurrency rank: https://www.coingecko.com/en.

References:

https://bitcointalk.org/index.php?topic=855564.0
http://askubuntu.com/questions/106351/running-programs-in-the-background-from-terminal
http://cryptorials.io/mine-cryptocurrency-normal-computer/

Get $5 Worth of Bitcoin and $10 Worth of Gold for Free!

Update 2017/3/27: Scam Alert!  Goldmoney will charge back all your bonus if you don't deposit and it seems there is no way to withdraw your bonus! It means Goldmoney is now forcing users to deposit. If you don't deposit, Goldmoney will simply clear your balance. This is very suspicious and like a scam! By the way, Goldmoney is not related to Eobot.

Update 2016/8/14: BitGold is now Goldmoney! Receive a gold bonus by registration using the following referral link:
Goldmoney.com/r/6teCxf

Update 2016/1/7: This offer by Eobot has expired, but you can still receive a gold bonus from BitGold by using the following referral link:
BitGold.com/r/6teCxf

This is a promotion provided jointly by the Eobot cryptocurrency mining service and the BitGold Bitcoin & gold exchange service. All you need is to register an Eobot account and use the referral link given to sign up a BitGold account and verify your phone number. This will cost you nothing because you don't need to do any purchase or deposit. In return, you will get 5 USD worth of Bitcoin bonus given by Eobot and 10 USD worth of gold bonus given by BitGold.

Instructions:

1. Register an Eobot account here: https://www.eobot.com/
2. Go to your account, Products-> $5 Free, and follow the instructions there.

3. After you sign up for BitGold, you will have your gold bonus, which need 60 days to be mature.

4. Wait for 30 days, you will get a confirm email from Eobot:

and receive your Bitcoin in your Eobot account, which can be withdrawn into your Bitcoin wallet for free:

Warning: When you sign up for BitGold, it will give you a chance to receive a 5% deposit bonus up to $100, if you make your first deposit within 15 minutes. However, it is not suggested to deposit into BitGold as this service just started and the price of gold fluctuates greatly. Anyway, invest at your own risk!

Eobot - Cryptocurrency Mining Made Easy

Eobot is a cryptocurrency mining pool and it offers cloud mining products such as Cloud SHA-256 2.0/3.0 GHS. Currently, it supports to mine Bitcoin, Litecoin, BlackCoin, Namecoin, Dogecoin, Dash, Reddcoin, BitShares, CureCoin (Cloud Folding), StorjcoinX, Monero, Counterparty, Stellar, Bytecoin, Peercoin, NXT, MaidSafeCoin, Ethereum, DAO, Lisk, Factom, Voxels,  Gridcoin (Cloud SETI) and Gold. You can mine on your own hardware using their miner software on Windows, or join their pool (SHA-256, Scrypt, X-11) using some other popular miner such as cgminer, cpu miner on Windows as well as Mac/Linux.To speed up your mining, you can buy their cloud (using your cryptocurrency deposit, PayPal Credit Card or US bank transfer), the 5 year rental contract for Cloud SHA-256 3.0 GHS is now about $0.90 per quantity (subject to Bitcoin price change, with total supply 100 THS). However, as they suggested, "Cloud mining should be considered as a fun, recreational activity and not a source of income or investment", it is not wise to invest too much.

You'll receive one free Dogecoin when you log in and can get about 2000 Bitcoin satoshi through their faucet, everyday. You can deposit, exchange and withdraw your cryptocurrency and the cloud rental in your eobot account; and the exchange fee is 5%, withdraw minimums are 0.001 BTC, 0.2 ETH/LTC/DASH, 1.0 DAO/CURE/PPC, 10 XRP/XMR/FCT/LSK/BLK, 100 DOGE/VOX/MAID/BCN/GRC, 1000 BTS/XEM, 10000 RDD, 1g GOLD.

Tips (How to mine without investment/claim free mining power from faucet): After registration, go to your account, change "Mining:" (top left corner) to "GHS 4.0" "GHS 3.0" or "GHS 2.0", then go to Menu Products -> Faucet (top right corner), you can claim free (cloud mining power) GHS contract everyday. Now you have some cloud GHS, you can change "Mining:" to what you want to mine. It's suggested to mine DOGE Bytecoin (BCN) as a beginner because it has the lowest withdraw threshold. The faucet will give you what you're mining when you claim. It's not suggested to claim some cryptocurrency and then exchange it to cloud mining power because there will be a >=5% exchange fee. So it is better to claim GHS contract directly (always change "Mining:" to GHS before faucet claim, after your claim, change "Mining" back what you want to mine).
To mine multiple coins at the same time, change "Mining:" to "Diversify", so you can select more than one coin you want to mine.

P.S. you can also use Eobot as an online multi-cryptocurrency wallet (with no withdraw fee and no fee for deposits but with minimum deposit requirements: 0.0001 BTC, 0.001 ETH/LTC/DASH, 0.01 DAO/CURE/BLK, 0.1 XMR, 1 DOGE/XRP/FCT/PPC/MAID/GRC, 10 RDD, 5 BCN, 100 XEM), or an instant cryptocurrency exchange service because you can deposit and exchange between any two of the cryptocurrencies it supports at any amount (however, the exchange fee is a little high from 5%).

Links:
https://www.eobot.com/
http://eobotchat.chatango.com/

Bitzfree - Free Bitcoin Cloud Mining

Bitzfree is a free cloud mining service (game) supported by ads and aims to spread the Bitcoin revolution. Users are given 20.00 initial SHA-256 Cloud GHs mining power for signing up. Each time you login you will be rewarded with some bonus points. To increase your GHash/s, you can convert your bonus or mined Bitcoins to GHs. And you can steal (hack) other users' GHs. You can also deposit some Bitcoins Gold to buy GHs at 0.0001 BTC/GHs 0.001250 BTG/GHs. The minimum deposit amount is 0.0001 BTC 0.001 BTG and the withdraw threshold is 0.0125 BTC 0.05 BTG.

Tutorial for Beginners:

As a beginner of the Bitzfree game, your main objective is to increase your hash power.

1. After registration, you will have 20 GHs.
2. Follow Bitzfree editor on facebook, and send an email to them of your facebook page, you will get 10 GHs Bonus.
You can also get some Bonus GHs by sharing Bitzfree through facebook and twitter. Click the "Bonus GHs" button to check the details.
3. In "My Cloud", Click "Activate Double Mining!" to activate double mining.
4. Click "Overlock" button, and overlock your GHs at about 110%~115%. (You need to click another "Overclock" button after the "+5", "+10" buttons.)
5. Click "Hack GHs" and hack as much as you can. Check the detailed tutorial (https://www.facebook.com/permalink.php?story_fbid=583238201777718&id=571212119646993) for GHs hacking. Tips: you can highlight the texts in the command window and do copy&paste (ctrl+c&ctrl+v) of the user's hash string.
6. Once you accumulated some bonus and Bitcoins, go to "Mining Strategy", and update it to "GHs Cost -20.00%" by dragging the triangle to bottom left corner and click the "update" button. Then in "My Cloud", click "All BTC to GHs" and "All Bonus to GHs" to convert them to GHs. Finally, go to "Mining Strategy" again, and increase the "Bonus Spawn Rate", "BTC Production", "Double Mining Time" by change GHs cost back to -0.00%.
7. Repeat Step 2~6, until you have a high GHs. Ideally, when the "Estimated Payment Time" in your "My Cloud" is less than 30 days, you may use "10% BTC to GHs" button instead of "All BTC to GHs" in Step 6, and wait for your payment.


Official Site: http://bitzfree.com/
Links:
http://howtointernetmoney.blogspot.com/2015/03/what-is-bitzfree-plus-payment-proof.html
http://www.bitlanders.com/blogs/bitzfree-bitcoin-cloud-mining/3290939
https://cryptocointalk.com/topic/27578-bitzfreecom-free-bitcoin-cloud-mining/

MinerGate - Cryptonote Mining Pool for Bytecoin, Monero, FantomCoin Mining with GUI Miner

Why Bytecoin and Monero?

Nowadays it is not profitable anymore to CPU mine most cryptocurrencies, such as Bitcoin or Litcoin. This page (http://cpucoinlist.com/) listed some altcoins that are still suitable for CPU mining, in which Bytecoin and Monero are the most popular two according to the cryptocurrency rank: https://www.coingecko.com/en.

Source: http://miscool.blogspot.com/2015/12/how-to-mine-bytecoin-google-cloud.html

MinerGate is CryptoNote mining pool for mining Bytecoin, Monero, FantomCoin, QuazarCoin, DigitalNote, MonetaVerde, Dashcoin, Aeon coin, Infinium-8. It offers a very nice GUI miner which supports Windows/Mac/Linux, and both CPU and GPU. You can also use their official console miner or connect to their pool using your favorite miner. The official miner's smart mining mode will choose the most profitable coin automatically for you to mine.

What's more, MinerGate has an official Android CryptoNote miner App and even support mining directly in your browser (Web mining) (MinerGate web mining is deprecated, try this web mining list instead).

MinerGate also has an easy to use cryptocurrency exchange site https://changelly.com/ which can help you to exchange your mined coins to Bitcoin (and other popular cryptocoins) at a good exchange rate.

Update: Now MinerGate also supports Ethereum mining using your PC's CPU or GPU.

Official Site: https://minergate.com/

YPOOL - Cloud Mining Pool for CPU

Update: Ypool was closed, try MinerGate instead.

ypool.net is a place for CPU (also GPU) mining, and it supports Litecoin, Primecoin, Protoshares, Dogecoin, Riecoin, Bitcredits. It is recommended to mine Riecoin with ypool as Riecoin is CPU only. Ypool provide a simple GUI software "ypool MinerManager" which combined many CPU/GPU miners and can help you to choose the most suitable one according to your PC and the coin you're mining.

The affiliated free cryptocurrency online-wallet http://wallet.ypool.net/ supports multiple currencies, including Bitcoin, Litecoin, Dogecoin, Peercoin, Namecoin. Primecoin, BitShares, ProtoShares, Riecoin. It also gives interest payout.

Some tutorials if you are interested in mining with a VPS:

Digital Ocean Riecoin Ypool Pool Mining Guide! CPU only! [RIC]
https://bitcointalk.org/index.php?topic=465765.0

Cloud mining Guide Protoshares - for ypool [working]
https://bitsharestalk.org/index.php?topic=1193.0

Mine Riecoin Via Google Cloud Free For 30 Days
https://bitcointalk.org/index.php?topic=855564.0

Official Site: ypool.net

Spacedesk - Desktop Extension to Multiple Device Screen Using WiFi

Spacedesk is a free (for non-commercial use) software which can expand your Windows desktop computer screen to other devices over the local area network, such as WiFi.Your primary desktop screen need to be Windows based but the secondary screen can be any operating system that supports a modern web browser, that includes Windows PC & Laptop, Mac, iPad, iPhone, Windows phone, Android tablet and Android phone. You just install a server software on your Windows and can connect from the device you wish to use as your secondary screen by the installed Windows client software or directly from your web browser based on HTML5 without installing anything.

It is a very good free alternative to the paid software iDsiplay, and is a good complementary software to ShareMouse and TeamViewer, as both of which are used with multiple devices but neither offer extended screen function.


Official Site: http://spacedesk.net/
Links:
http://superuser.com/questions/62051/is-there-a-way-to-fake-a-dual-second-monitor
https://www.youtube.com/watch?v=uQBTn21214Q (In fact, you can also use TeamViewer to extend your screen by faking a second monitor)

How to Start Earning Some Free Bitcoins in 10 Minutes

Firstly, you need to have a bitcoin wallet. If you don't have one, you can register an account for free at blockchain.info. Then you'll get a bitcoin address (check your blockchain wallet dashboard, receive money, Addresses, Your receiving bitcoin addresses, the "Active" tab), which looks like some long random string. For example, my is "1D8kTXYk2srgGuTrCBP3wu64288GwqKCoS".

Now you are ready to go to some faucet sites and earn free bitcoins. Faucet sites are supported by online advertisements and get their traffic by tipping bitcoins (or other cryptocurrencies) to visitors.There are many faucet sites, usually pay you 100~1000 satoshi (smallest fraction of a Bitcoin that can currently be sent = 0.00000001 BTC) each time you visit. As a beginner, I suggest to try epay.info, which is user friendly and proved to pay. No register needed for epay.info (you can secure your epay account by an email and password later), just go to the URL like
http://epay.info/free-bitcoin/1D8kTXYk2srgGuTrCBP3wu64288GwqKCoS/,
with the bitcoin address "1D8kTXYk2srgGuTrCBP3wu64288GwqKCoS" in it replaced by yours. It shows you a list of faucet sites - just click the button "start browing faucets", you are visiting the faucet sites using epay's rotator. And inside the faucet site page frame, all you need is to find the buttons like "Spin"/"Next"/"Claim" hidden in the ads and solve some captchas (to prove you're a human). After that, you'll get your free bitcoins paid into your epay account.

Once you get paid, you can click "visit next site" (on the right upper corner) to go on your earning. You can withdraw the bitcoins in your epay account to blockchain.info once you reach 0.00013000 BTC (this is not hard since if you play all faucet provided by epay at the time, you can earn 1,543,586 satoshi daily).

Links:
http://blockchain.info (get a wallet)
http://epay.info/ (visit faucet sites and receive tipping)

Get Your Free Domain Name at Freenom.com

Freenom.com offers free ".tk", ".ml", ".ga", ".cf", ".gq" domain names. All you need is to register an account with an email address, no personal details or credit card information is needed. You can search and pick your free domain name (subject to availability), and hold it for free for one year and renew it without paying anything when near the expiry (they will send you an email to remind you to renew), which means you can have your domain for free as long as you like!

You can choose to simply URL redirect your free domain name (e.g. check miscool.ml), or host it using some free service, such as the FreeDNS provided by namecheap.com, or host it by your web hosting provider.

Official Site: http://wwww.freenom.com/

The Mind Reader Game - Akinator the Genie

Akinator is game that can guess which character you are thinking of by asking you a series of Yes/No questions. It is available as a free Internet web game, as well as paid Android, iOS, WP and BlackBerry mobile app. It also supports to play in more than ten different languages. A free Android version is available in Amazon Underground.



Official Site & Play the Web Version: http://en.akinator.com/

Amazon Underground - Get Paid Android App & Games and In-App Items For Free!

Amazon introduced a new Android app store - Amazon Underground, which offers many paid Android apps and games for free. It also brings a new method for developers to generate revenue from every customer - amazon will pay the developers for every minute spent in their Amazon Underground app by every user.

Some popular paid apps & games available for free in Amazon Underground are: OfficeSuite Professional 8, PhotoSuit 4, ezPDF Reader, CityMaps2Go Pro, Akinator the Genie, Samurai II: Vengeance, Goat Simulator, Raiden Legacy, Dark Incursion...

Links:
http://amazon.com/underground
https://developer.amazon.com/public/solutions/underground

Use One Mouse & Keyboard to Control Multiple Computers

If you have more than one computer and usually use them at the same time, it is more efficient to use the mouse & keyboard of one computer to control all the computers. Fortunately, there are several free softwares for you to do this.

ShareMouse is a freeware for personal use, which even allow you to share your mouse keyboard across Windows and Mac. And ShareMouse can do more than just share your mouse - you can also drag & drop files and share the clipboard (such as Ctrl+C/Ctrl+V content) between computers!

Official Site: http://www.keyboard-and-mouse-sharing.com

Mouse without Borders is another similar free program by Microsoft but only work with Windows. Using it you can also copy text or drag and drop files across computers.
Download: http://www.microsoft.com/en-us/download/details.aspx?id=35460

Free & Open Source Online Grammar and Spell Checker

LanguageTool is an open source proof­reading soft­ware for more than 20 languages, including English, French, German, Polish, Chinese... It finds many errors and several grammar problems that a simple spell checker cannot detect. You can check your grammar and spell online and can also download the plugin for LibreOffice and OpenOffice, and the browser extension for Firefox or a stand-alone for your Desktop.

Official Site: https://www.languagetool.org/
Source Code: https://github.com/languagetool-org/


Grammark is an open source online writing aide for the English language that helps improve writing style & grammar and teaches students to self-edit.Works best for college-level essays, it gives a "score" based on problems and is customizable.

Official Site: http://grammark.org/
Source Code: https://github.com/markfullmer/grammark

PPSSPP - A Free & Open Source PSP Emulator

The best free & open source PSP emulator PPSSPP just got the 1.0 release! PPSSPP can run your PSP games on your PC, Mac, and even Android and iOS device (and also many other platforms by unofficial ports, such as Linux, Blackberry and Symbian)! It supports most commercial PSP games at a decent frame rate, and what's more, as the unique emulator features, you can play in full HD resolution and save & restore game state anywhere, anytime!

Official Site: http://ppsspp.org/index.html
Download: http://ppsspp.org/downloads.html
Commercial Games - Compatibility and Results:
http://forums.ppsspp.org/forumdisplay.php?fid=5

Free App to Create 3D Sculptures - 123D Sculpt+

Autodesk's 123D Sculpt+ is absolutely the top App for creating 3D models on your Android tablet or iPad. Starting from stick figures, you can sculpt the details, paint the textures and pose your models. You can export your creations to OBJ files for further editing and can share them to the community easily.

This free App is available at Google Play and the App Store. What's more, according to the 123D FAQ, your creation can even be used for commercial purposes freely if you share it to the 123D Gallery!

Get the App at: http://www.123dapp.com/sculptplus

Update on 2015/7/3: The windows version of sculptplus has finally been released! See the official blog for details: http://blog.123dapp.com/2015/06/123d-captures-windows-phones-and-tablets

Update on 2017/5/16: Sad news, 123dapp was closed! See announcements here:
http://web.archive.org/web/20170406144218/http://blog.123dapp.com/2016/12/important-news-about-the-next-chapter
http://web.archive.org/web/20161223192148/https://support.tinkercad.com/hc/en-us/articles/115000144307-Can-I-still-use-the-apps- 
The new successor by Autodesk is web based app https://www.tinkercad.com/, but it seems that it has no sculpting functionality.
The 123D Sculpt (with limited functions) can still be downloaded at:
https://www.microsoft.com/en-us/store/p/123d-sculpt/9nblggh39h05 (Windows)
https://apkpure.com/123d-sculpt/com.autodesk.Sculpt (Android)

KOReader - Turn Your Android Phone and Tablet into a Kindle-like E-reader

KOReader is an open source document viewer, originally created for Kindle e-ink readers. It currently runs on Kindle 5 (Touch), Kindle Paperwhite, Kobo and Android (2.3+) devices.

The most important feature of this app as a pdf reader that many other apps (including Adobe's own PDF Reader for Android) don't have, is text reflow for scanned documents and scientific documents with lots of mathematical formulas, thanks to its built-in K2pdfopt support. What's more, since it is originally designed for Kindle e-ink reader, the app has a very similar look and feel as the Kindle e-ink user interface, which is very clean and elegant. However, first time users may not be used to this Kindle-like interface and touch. For example, at first I thought I need to scroll down from the top of the screen to open reader's setting menus, which is of course a conflict with the default gesture input for opening the Android message center. Then I realized that a single tap at the top center of the screen is the right way to open the setting (while the typical back and menu buttons of an Android phone actually do nothing with the app). But if you have some experience with the Kindle e-reader, it is very natural and easy for you to get started with the app.

This free app can be download at:
https://github.com/koreader/koreader/wiki/Download
(Including ".apk" version for Android phones and tablets, as well as the Kindle and Kobo e-ink reader version.)

Links:
http://www.mobileread.com/forums/showthread.php?t=209276
https://github.com/koreader/koreader/ (Source Code: AGPL)

The Internet Archive's MS-DOS showcase - Run Old DOS Programs and Play Old DOS Games in Your Browser

Based on the open source DOS emulator DOSBox's Emscripten port,the Internet Archive collected many old DOS programs and games that can run directly in your browser:
https://archive.org/details/softwarelibrary_msdos_games

The collection include many famous old DOS games, such as 4D Prince of Persia, Bruce Lee, Wolfenstein 3D, SimCity and Tyrian.

See also: http://js-dos.com 

Links:
http://ascii.textfiles.com/archives/4487
http://mozakai.blogspot.com/
https://archive.org/details/softwarelibrary_win3 (Windows 3.1 programs run in browser)

The Black Heart - Free Gothic M.U.G.E.N. Fighting Game

Featured in the book "250 indie games you must play" by writer Mike Rose from indiegames.com, "The Black Heart" is a fighting game based on the M.U.G.E.N. engine.It has six playable characters, and were all made by one person (Andrés Borghi) through 7 years of hard work.

If you enjoy pixelated blood, fluid gameplay in Capcom style, combos, tragic and epic music, weird pictoric landscapes and complex storytelling this is the game for you!

Game Download:
http://gamejolt.com/games/action/the-black-heart/14718/
Official Site:
http://www.theblackheart.com.ar/