For Placements:
http://www.ittestpapers.com
http://www.yuvajobs.com/paper.asp
http://www.freshersworld.com
http://www.placement-papers.com
Free Online Books:
Free Computer Books
Free Orelly UNIX Books
Description About HTML Elements
Programming in C
UNIX System Calls and Subroutines using C
Some Famous Professor's Links:
Knuth(Standford University)
Allam Apparao(Andhra University)
Krify
Courses Offered At Stanford University( You can get slides,material,useful information)
William Stalling