WEB LINKS

.http://www.sagemath.org/.

http://www.xm1math.net/texmaker/.

http://www.damicon.com/resources/opensoftware.html

http://www.tripwiremagazine.com/2010/03/20-most-popular-open-source-software-ever-2.html

crazyproject.wordpress.com/‎(Very useful site it contains the solution of the famous book  Dummita and fotte)

http://en.bookfi.org/

http://www.bookboon.com

http://www.getfreeebooks.com/

http://www.onlinefreeebooks.net/

http://www.freebookspot.es/