LyX is an open source document processor based on top of the LaTeX typesetting system.

MiKTeX is a distribution of the TeX/LaTeX typesetting system for Microsoft Windows.

TeX Live is a free software distribution for the TeX typesetting system that includes major TeX-related programs, macro packages, and fonts.

GNU TeXmacs is a free scientific word processor and typesetting component of the GNU Project.

TeXstudio is a cross-platform open source LaTeX editor with an interface similar to Texmaker.

Kile is a TeX/LaTeX editor to edit TeX/LaTeX source code.

Gummi is a simple LaTeX editor.

LaTeXDraw is a free and opensource graphical PSTricks editor or generator for latex.