Computer technology
Good programming tutorials, Java, python etc
www.zetcode.com
Emulation tutorials covers NES, GB.
http://codeslinger.co.uk/pages/blog/wordpress
OpenGL, 3d game tutorials, NeHe ( Neon, Helium)
http://nehe.gamedev.net/
http://www.gamedev.net/
Game competition
http://www.ludumdare.com/
Good programming tutorials, Java, python etc
www.zetcode.com
Emulation tutorials covers NES, GB.
http://codeslinger.co.uk/pages/blog/wordpress
OpenGL, 3d game tutorials, NeHe ( Neon, Helium)
http://nehe.gamedev.net/
http://www.gamedev.net/
Game competition
http://www.ludumdare.com/
Indie Games
http://www.tigsource.com/
http://www.tigsource.com/
Game development resources like arts, music
For geek computer users
http://www.geek.com/
Good Linux stuff, books etc.
http://www.linuxtropia.org/
Science
Very good tutorial on Waves and signals
http://www.doctronics.co.uk/signals.htm
Science projects - for science lovers
http://www.scitoys.com/
Music
Mod, XM, IT, S3M Module musics
http://www.modarchive.org/
Game music remixes
http://www.ocremix.org
http://remix.thasauce.net
Game music collection
http://www.gamemp3s.net
Snes music collection
http://snesmusic.org/v2/
Emulators, console musics, roms utils etc
http://www.zophar.net
Arts
Ocean of artists
www.deviantart.com
Hardware
Hardware projects, circuits, pin-outs
http://www.epanorama.net/
http://www.pinouts.ru/
Books
http://safari5.bvdep.com/
http://www.gutenberg.org/
http://www.bartleby.com/
Research papers
http://arxiv.org/
http://www.geek.com/
Good Linux stuff, books etc.
http://www.linuxtropia.org/
Science
Very good tutorial on Waves and signals
http://www.doctronics.co.uk/signals.htm
Science projects - for science lovers
http://www.scitoys.com/
Music
Mod, XM, IT, S3M Module musics
http://www.modarchive.org/
Game music remixes
http://www.ocremix.org
http://remix.thasauce.net
Game music collection
http://www.gamemp3s.net
Snes music collection
http://snesmusic.org/v2/
Emulators, console musics, roms utils etc
http://www.zophar.net
Arts
Ocean of artists
www.deviantart.com
Hardware
Hardware projects, circuits, pin-outs
http://www.epanorama.net/
http://www.pinouts.ru/
Books
http://safari5.bvdep.com/
http://www.gutenberg.org/
http://www.bartleby.com/
Research papers
http://arxiv.org/
Others