Great C Tutorial
Dr. Dave Marshall at Cardiff School of Computer Science has written a great C tutorial. This tutorial is mostly aimed at UNIX C developers and covers the basics of C programming to advanced multi-threaded application development. This is the tutorial that I used to learn C and I still open it up whenever I need to look up something new or need a quick refresher on something. Unfortunately it appears that Google keeps burying the link so I thought it would be helpful to others that are looking for in my opinion the best C tutorial available online.