This site is really useful for Linear Algebra since it has tools for solving row echelon form, reduced row echelon form, Matrix inverses of [I|A]=[I|A^-1], and much more, it's truly worth you time especially if you have had any difficulty with some of the row operators like i have.
Very neat site, they have a lot of free screen cast tutorials on how to use all kinds of software that you might just need a simple nudge to get into.
This is just so cool. A very useful tutorial on using C and pointers and memory etc.
This is a good place to start learning ruby 
This seems to be a pretty good tutorial for setting up CVS Servers
This is a really good site for people who are not extremely experienced with linux. This is a good start for most of you new linux users.
This is a Tutorial i have yet to read, but if anyone finds it useful, that's great