Similar to LaTeX

Metafont

MetaPost

MiKTeX

MusiXTeX

Omega (TeX)

PdfTeX

PGF/TikZ

PSTricks

TeTeX

TeX

TeX Live

Texmaker

TeXShop

TeXstudio

TeXworks

List of TeX extensions

WinShell

XeTeX

XyMTeX

Web (programming system)

Haruhiko Okumura

Donald Knuth

TIPA (software)

Texinfo