TeX-related publications
The (La)TeX Navigator. (Owing to lack of staff, French and German versions are no longer maintained. Volunteers to provide translation support are welcome; please contact Denis Roegel if you can help.)
Hypertext Help with LaTeX from the NASA Goddard Institute for Space Studies (even rocket scientists need to read the manual!)
CTAN -- the Comprehensive TeX Archive Network, with locations around the world.
Use the CTAN search facility, implemented by Jim Hefferon, to look for the name of a file you need, or search Graham Williams' TeX Catalogue by keyword
The TeX Catalogue contains concise descriptions of TeX and LaTeX tools and packages, mostly available from CTAN, and includes additional links to many informative Web pages and authors' home sites.
The search screen also contains pointers to other information sources.
TeX Users Group (TUG)
Donald Knuth's TeX pages
Why TeX?, a comparison of structured document input vs. WYSIWYG, by Allin Cottrell
TeX Frequently Asked Questions, compiled by the UK TUG
FAQ LaTeX de l'équipe Grappa, in French (old, HTML)
FAQ de fr,comp.text.tex, in French (newer, PDF)
DANTE's FAQ, in German
other electronic FAQs and mail addresses for TeX-related product information and assistance
UPenn TeX Web page
The LaTeX3 Project
The LaTeX bugs database
LaTeX: from quick and dirty to style and finesse, by Tony Roberts, University of Adelaide
LaTeX resources page (many links, unfortunately not all up to date)
BibTeX resources via public-domain TeX sites
pdfTeX, a variation on TeX that generates a pdf file instead of dvi
e-TeX reference site
The Omega project