A List of JavaScript Cryptocurrency Miners

JavaScript based cryptocurrency miners can be embedded in a web page as a replacement for advertisement to monetize your websites. When users are visiting the page, the embedded JS code will run in background and mine the cryptocurrency for you. (Last Update: 2019/3/14)

CoinHive (discontinued)
Cryptocurrency: Monero
Minimum payout threshold: 0.05 XMR (~$4) 0.02 XMR
(payments fee: 0.005 XMR if less than 0.5 XMR)
Revenue sharing: 70% (you)
Note: Also supports Link Forwarding and Proof-of-work CAPTCHA.

GridCash (Site Down)
Cryptocurrency: Monero
Minimum payout threshold: 0.004 XMR or 1 WMZ (WebMoney)
Revenue sharing: 70% (you)
Note: Provide easy to use PHP+JS code to bypass blockings.

JSECoin (non cpu intensive)
Cryptocurrency: JSECoin
Note: See also http://www.miscool.ml/2017/10/jsecoin-javascript-based-cryptocurrency.html

Crypto-Loot
Cryptocurrency: Monero & uPlexa
Minimum payout threshold: 0.3 XMR or 5000 UPX
Revenue sharing: 88% (you)
Note: It has self-hosting option + CNAME Proxies instead of using its server hosted JS library.
Note: Currently the best alternative to CoinHive. Now it supports Link Forwarding (shortlinks) and Proof-of-work CAPTCHA.

Coin Have (Site Down)
Cryptocurrency: Monero
Minimum payout threshold: 0.5 XMR (~$50)
Revenue sharing: 85% (you)
Note: It also supports web extension.

CloudCoins (Site Down)
Cryptocurrency: Monero
Revenue sharing: 85% (you)

HashforCash (Site Down)
Cryptocurrency: Monero
Revenue sharing: 95% (you)

Minero (Site Down)
Cryptocurrency: Monero
Revenue sharing: 98% (you)

ProjectPoi (Site Down)
Cryptocurrency: Monero

Inwemo (Site Down)
Cryptocurrency: Monero

MoneroMiner
Cryptocurrency: Monero

Simplecoin
Cryptocurrency: Pay in Clam or Dogecoin

CoinIMP
Cryptocurrency: Monero & Webchain
Payout: 97% if advertisement is enabled, 90% if advertisement is disabled

Others (CoinHive pool with low payment threshold, e.g., to FaucetHub):
DogeMiners (Site Down)

Cryptocurrency: Pay in DogeCoin via FaucetHub
http://ad-miner.com (Site Down)
https://minehub.online (Site Down)
http://u2cloudmining.winspiral.net/monero_mining.php
http://minercoin.net (Site Down)
https://mineiota.com/ (minimal payout: 1 IOTA)

Links:
https://github.com/cryptonoter/CryptoNoter
https://coinhive-proxy.party
https://github.com/x25/coinhive-stratum-mining-proxy (Python)
https://github.com/cazala/coin-hive-stratum (Node.js)
https://github.com/keraf/NoCoin
http://monerominer.life
http://www.socketminer.com
https://brominer.com
http://www.monero-miner.com
https://www.webminerpool.com

JSECoin --- JavaScript Based Cryptocurrency Mined by Webmasters for Replacing Ads

JSECoin is a JavaScript cryptocurrency that can be mined in a web browser. As webmasters, you can replace ads/earn revenue from your websites with background mining by embedding a simple piece of JavaScript code. And you can also mine the cryptocurrency directly by yourself in your account dashboard. What's more,

"The cryptography code snippet uses less resources than a video advertisement and is less obtrusive to the user experience!"

Click me to register an account now and get 0.12 JSECoin (worth 0.12 USD) rewards!

Project Status:
JSECoin on Google Trends

Why and How to Disable JavaScript in Your Browser

Disable JavaScript, For a Better Web!

Why should we disable JavaScript?

The short answer: "JavaScript = Advertisement = Evil".

Unlike the Flash Player, which is just a standalone plugin and can be easily uninstalled, JavaScript is built into your web browser and can never be removed completely. Fortunately, most browsers offer the option to disable JavaScript. Unlike using the third party plugins such as "AdBlock", which is as "evil" as the Flash plugin, disable JavaScript is "The Most Easy and Effect Way to Block Web Ads". Disable the "evil" JavaScript now and return to the world with clean and secure web.

So how can I remove JavaScript?

Depending on your browser (Chrome, Edge, FireFox, IE, Safari, Opera), find and follow the steps to disable JavaScript in this link.

Some websites are really user unfriendly and require me to use JavaScript to function properly, what should I do?

Option 1: Follow you heart and Do the Right thing.

Option 2: Knee down to JavaScript. Undo the steps for disabling JavaScript to enable it. Or use a separate secondary browser for JavaScript. Or selectively enable JavaScript for white-listed sites.

Links: http://www.wired.com/2015/11/i-turned-off-javascript-for-a-whole-week-and-it-was-glorious/
Not convinced? Try these malicious examples:
www.pcinfotechno.com/blue-screen-error-windows/error/index.html
www.pchelpcare.info//2alert/problem-0210x0002/index.html
http://www.pc-protectionsoftware.info/blue-screen-windows/win-2549/index.html
http://www.pc-health-checkup.com/computer-firewall-support/error/index.html
http://www.bugcleaner.info/device-software-error/defect/index.html

Doom Turned 21, Play Doom Online!

Doom, Heretic and Hexen - Play the demo version of three remarkable FPS games based on id Software's first generation Doom engine in your browser! The games are ported to Flash by Newgrounds admin mike with Adobe Alchemy, using the original source code of the games.

 
Play the DOOM TRIPLE PACK Here:
http://play.flaswf.tk/PTWBGC/Text/FPS/DoomTriplePack.html

And the open source Freedoom game assets running on PrBoom, compiled to HTML5 with Emscripten, runs in most browser, can be played at
http://kripken.github.io/boon/boon.html
Different from the Doom Triple Pack which uses orignial game code and offical assets, this game uses custom made game resources.

Finally, there is a PC emulator written in Java which can run unmodified Doom.exe in your browser:
http://jpc.sourceforge.net/doom.html (require Java)

Links: http://mochadoom.sourceforge.net/ (Doom Java port)

Javascript PC Emulator - Linux in JavaScript

A very cool project by Fabrice Bellard, a Javascript PC emulator, which can even boot Linux. See Linux in JavaScript within your browser:
http://bellard.org/jslinux/

The Linux in the demo even contains a C compiler, an Emacs Clone and a small MS-DOS .COM launcher.