Very Simple and Easy To Use AES Functions based off of Tiny-AES-c, all slimmed down into one file with a configurable Nb, Nk, and Nr value, with some included bit and byte utilities, several wrapper functions for OFB and CTR mode, and a very easy to follow demo to help you write your own code for it.
Just copy and paste the aes.c file into any folder you want and be sure to #include "aes.c" in your .c file.