Entertainment
Comics:
- https://www.xkcd.com/ for nerdy comics
Web:
- https://theuselessweb.com/ for an endless stream of strange webpages
- https://www.discuvver.com/ for "useful" webpages
- https://pdos.csail.mit.edu/archive/scigen/ for fake paper generation
Music:
- https://emmitfenn.com for amazing visuals fit to the sound
- https://www.incredibox.com/ to create music with others
- http://dinahmoelabs.com/plink/ to create music with others
- https://www.noisli.com/ to create ambiance music
- http://soundrown.com/ to create ambiance music
- https://emmitfenn.com music with visuals combined
- https://radioparadise.com/ for DJ music
- https://tidal.com/ for streaming
- https://everynoise.com/ to discover music genres
Draw:
- http://weavesilk.com/ to draw silk online
Exercise::
- https://musclewiki.com
Art:
- https://www.nivrozenberg.com/fineart#/summit/
- https://www.patrikfuchs.com/10065593/isolatoren