Thanks mcangeli for giving us this forum. Anyways as the first topic I think it may be helpful to keep a database of books/resources that people find useful. Heres what I have on my desk

vi pocketbook
Linux 3D
STL Tutorial and Reference
OpenGL Programmers Guide (the red book)
College Physics book
College Calc book
Game Programming Gems (1 through 4)
Encyclopedia of Mathematics
Linux Kernel
Shellcoders Handbook

Other books I found/find useful:
Tcp/IP administration
Operating Systems Textbook from school


online resources:
intels instruction reference
AoA
/.*google.*/

and last but far from least:
MAN PAGES