Knowledge

1. Wikipedia
2. MIT OpenCourseware
3. Mathworld
4. ArXiv
5. TED Talks
6. Paul Graham
7. John Baez
8. Mechanical Universe Videos
9. Physics Applets
10. HyperPhysics
11. Delights of Chemistry
12. Pedagogic Physics Diversions
13. CRC Handbook of Chemistry and Physics
14. Sam Barros' Powerlabs
15. Interview Puzzles
16. Epicurious
17. Smithsonian
18. The Newton Project
19. Einstein Archives
20. PhDs.org
21. Metamath
22. Internet Movie Database

Computers

1. Internet Archive
2. GNU C Library
3. ArsDigita University
4. Bit-Tech
5. Hack a Day
6. Win32 API Help File
7. Flash Kit
8. NeHe OpenGL
9. WinCustomize
10. ACME Laboratories
11. Epanorama
12. Programmer's Heaven
13. TIcalc.org
14. Notebook to PDF Converter

Free Books

1. Project Gutenberg
2. Penn Online Books
3. The Assayer
4. Amazon Free Ebooks
5. About.com Free Books
6. Tech Books For Free
7. Logic and Set Theory
8. Derivations of Applied Mathematics

News and Blogs

1. CNN
2. The Economist
3. Slashdot
4. digg
5. Kuro5hin
6. Engadget
7. Philoneist
8. Podcast.net
9. HowToLive.org

Media & Social Networking

1. Shoutcast
2. Pandora
3. Google Video
4. Deviant Art
5. Flickr
6. Youtube
7. Metacafe
8. Bolt
9. Facebook
10. RocketBoom