I maintain the Usenet comp.lang.c FAQ list.
It's also available as a book.
I used to teach a pair of C programming classes, and their notes are all on line.
(More information about C.)
Some programs and other source code I've written that might be useful to you.
A remembrance of the late Dennis Ritchie.
Other stuff I've written (mostly C-related Usenet posts).
The ISP hosting this page and where I receive my e-mail, eskimo.com, is a rare and special one, perfect for my needs. If you're looking for an ISP that gives you the access you need (including Unix shells) without getting in your way or charging too much, check it out.