The Comprehensive TeX Archive Network is the authoritative collection of materials related to the TeX typesetting system.
You can learn about TeX, LaTeX, and friends. Then our introduction page will get you started.
If you're looking for something TeX related then you've come to the right place.
Right from the start TeX folks have been building a community by sharing. You can use most of the material archived here without restriction.
If you have developed some TeX-related material then you can share back by uploading it.
CTAN includes a worldwide
set of mirrors, sites that offer our holdings
for download.
These sites help the community in many ways;
for instance, if you make a link of the form
"http://mirror.ctan.org/macros/latex/contrib"
then people clicking on the link get the materials from a mirror near to
them.
So another way that you could help out is by
running a mirror.
A perhaps less taxing way to express your appreciation is to make a donation — small efforts add up!