LaTeX ['la:τεχ] is a software package that simplifies the use of the typesetting programme TeX with the help of macros. LaTeX is currently available in version 2ε.

The TeX programme was developed by Donald E. Knuth, a professor at Stanford University. In the early 1980s, Leslie Lamport developed LaTeX, a very powerful collection of TeX macros. The name means Lamport TeX. Today, LaTeX is probably the most popular method of using TeX.
(from wikipedia)

For Windows

• MikTeX
• TeXLive

For Linux

• Ubuntu
• Fedora
• Suse

For MacOSX

• MacTeX

General

• TeXLive Distribution

For Windows

• TeXnicCenter
• WinEdt
• TeXShell

For Linux

• Kile

For MacOSX

• TeXShop

System-independent

• Visual Studio Code with LaTeX Workshop
• TeXMaker
• Eclipse with TeXlipse

• DANTE e.V.
• LaTeX forum at www.mrunix.de
• www.latex-project.org
• The Usenet group en.comp.text.tex
• The Freiberger LaTeX User Meeting (FLUM), formerly. the Freiberger LaTeX-Stammtisch
• The LaTeX compendium at de.wikibooks.org