The Internet is incredible because of the insane effort individuals put into making great sites, blogs, experiences, and making them available to all for free. #ref

• Earthworm, an open-source English learning tool.
• Master How To Learn, learning science
• Computer skills route, roadmap.sh.
• Tsumego Hero, a great GoGame site for newbies.
• BesoGo, Embeddable SGF editor/viewer for the game of Go (aka Weiqi, Baduk).
• tombkeeper’s @weibo archive.