Virtually all TeX, LaTeX, and related software and documentation can
be obtained from CTAN, which has multiple ftp mirror sites.
See for example these
US and
UK sites.
Text Processing Using LaTeX
from Cambridge Univ. Engineering Dept. includes excellent beginning
and advanced hypertext manuals as well as information in other formats.
Macintosh users will want to take a look at Gary Gray's
TeX/LaTeX Software for the
Macintosh, with pointers to many tools for dealing with LaTeX
and what's new listings.
For those with less experience with LaTeX, good introductory material
includes:
The (La)TeX navigator
from LORIA in France is an excellent source of documentation and pointers
to other resources. The site is also in available in
English and
Deutsch.
Lots of
documentation,
mostly PostScript, is available from King Lee at Cal State-Bakersfield.
TeX
and Friends, from UCLA, is mostly (compressed) PostScript files.
Tex-related
documents from Cambridge Univ.; includes TeX Users Group newsletter
and many documents (mostly in dvi format).
The Usenet newsgroup
comp.text.tex can be a good
source of information and help (but read the FAQ before posting).