I have looked everywhere for a good, complete assembly language tutorial written using the AT&T syntax without success. Can anyone here tell me where I can find one? I also am looking for information on reading music files(mod, s3m, it, xm, midi, mp3), and image files (tga, pcx, bmp, gif, jpeg, .art), and animation files (mpeg, mov, flic).

AT&T ASM: http://linuxassembly.org/

File formats: http://www.wotsit.org (usually has code snippets or full source code to libraries).

You will also want to check Imlib and DevIl for image manipulation. Xine and mplayer can play quite a number of animation formats. Xmms can play a certain number of audio formats. All of them come with the source code and, while most of these are *nix libraries/applications, the code is usually ANSI C, so feel free to download and study if wotsit doesn''t have documentation/code about a file format.