BioMed Central's TeX template http://www.biomedcentral.com/info/ifora/tex
LaTeX style files for the Proceedings of the SPIE http://public.lanl.gov/kmh/spie/
NIPS 2005 Author and Reviewer Materialhttp://www.kyb.tuebingen.mpg.de/bs/people/bs/nips05.html
Michael Forman's Curriculum Vitae LaTeX CV template and Makefile which I referenced heavilyhttp://www.michael-forman.com/vitae/
Daniel Lamblin's Resume http://www.syntaxerr.org/~daniell/resume/
http://www.cs.iastate.edu/~leavens/include/
book (part of your standard install)
scrbook (part of the KOMA class, comes with your standard install as well, if not find it here)
memoir - can be found on CTAN
Springer http://www.springer.de/author/tex/help-book.html
Birkhauser http://www.birkhauser.ch/misc/tex_mono.htm
University of Chicago Thesis LaTeX stylehttp://www.lib.uchicago.edu/e/phd/macros.html
EE TAMU EDUhttp://ee.tamu.edu/~tex/
IEEE Templates Collectionhttp://www.sims.berkeley.edu/~christin/templates.shtml