D3WASM --- Play Classic DOOM 3 in Your Browser

D3WASM is an experimental port of the Doom 3 Engine to Emscripten/WebAssembly and WebGL, allowing you to play the famous Doom 3 game inside modern web browsers. You can now try the Doom 3 Demo version at (need a modern web browser, and a PC with good CPU and RAM):
http://wasm.continuation-labs.com/d3demo/

Project Homepage: http://www.continuation-labs.com/projects/d3wasm/
Source Code: https://github.com/gabrielcuvillier/d3wasm

D.Tube --- Decentralized Video Platform

D.Tube is a decentralized YouTube alternative based on the STEEM blockchain and the IPFS peer-to-peer network. Different from YouTube, it is ads free and resistant to censorship! You need a steemit account to post videos. There are no number of files and file size limits to uploading videos, and you may earn STEEM as rewards from your videos.
You can visit D.Tube at https://d.tube

Links:
https://github.com/dtube/

HelioHost --- Free Full-featured Web Hosting with Unlimited Bandwidth

HelioHost is a nonprofit free web hosting service provider. Different from many free hosting services, it never tries to sell any paid plans but only encourage customers to make donations. The service supports scripting Languages such as PHP, ASP.NET, JAVA/JSP, Ruby on Rails, Python (CGI, and Django framework), Perl, and SQL databases, 1000MB of data storage (cPanel file manager, FTP, FTPS, SFTP, or webdisk), unmetered bandwidth and unlimited domains. What's more, visitors are ads-free with hosted sites. However, you need login to HelioHost at least once a month to keep your account active. Otherwise, you will receiving inactivity emails and may have to login to reactive your account.

Official Site: https://www.heliohost.org/

Psiphon --- Free and open-source Internet censorship circumvention tool for Windows and Mobile

Psiphon is a free and open-source Internet censorship circumvention tool for Windows and mobile phones. If you're using public WiFi or if your Internet is censored, you can use Psiphon to surf securely and bypassing censorship. Psiphon utilizes a combination of VPN, SSH and HTTP Proxy technology to provide you with free and uncensored access to online content.

Psiphon features "Trust, Speed, Simplicity", so it is very easy to use --- just download, click and run, and the connection speed is fine. However, Psiphon is centrally managed and "does not increase your online privacy, and should not be considered or used as an online security tool" (You should try Tor or I2P instead). Besides, it is only available on Windows, Android and iOS.

Links:
https://psiphon.ca
https://www.psiphon3.com
get@psiphon3.com (request to have Psiphon sent to you via email)
https://bitbucket.org/psiphon/psiphon-circumvention-system (source code)

Daniel's Hosting --- Free Anonymous Tor Onion Web Hosting

Daniel's Hosting offers free Tor .onion web hosting, where you can set up your website with a .onion URL address in the tor network. This free service gives you almost everything to create a .onion site, including PHP, SQL, FTP, Mail function, and currently there is no disk usage quota. A website with a .onion domain suffix can only be accessed by Tor Browser or through some Tor proxies, but you can contact the admin to get a free clearnet subdomain of danwin1210.me, and/or an I2P domain.

However, please note this service may not be very reliable, you may lost your site because of a server hack. So make sure to backup your site and data frequently, or try some decentralized platform such as ZeroNet.

Links:
List of hosted sites by Daniel's Hosting: https://hosting.danwin1210.me/list.php
Onion link list: https://onions.danwin1210.me/onions.php (find interesting .onion sites and submit your own)
https://www.torproject.org/docs/tor-onion-service.html.en
https://timtaubert.de/blog/2014/11/using-the-webcrypto-api-to-generate-onion-names-for-tor-hidden-services/
https://github.com/katmagic/Shallot (.onion name generator)