I love TeX (though, really, I LaTeX), and really enjoy TeXing up class notes and even old math books that weren't typeset using it. I suppose this might not be the best use of my time, but it's a fun hobby (until somebody gets mad about copyrights or something). Here's what I've got for you:

• Algebra Notes: I typed up the notes from Dr. Peter Abramenko's first year algebra sequence, as well as his class on classical groups. If you'd like, feel free to email me for the source files.
• The Geometry of Iterated Loop Spaces: Dr. Peter May has given me permission to post my typed version of his text.

If you spot any typos in any of these texts, please let me know.

I suppose it's not really 'math', but Matt Z. gave me permission to post my TeXed version of his 'Greek Mathematician with Fish' drawing. It's not a perfect rendition, but it's as close as I feel like getting for now. For comparison purposes, here's a scan of an original, by Z himself.