WikiTeX

Development on WikiTeX has been going on since 2003, and was primarily a means to bring chess, music, math and other LaTeX objects into Wiki; we've since expanded, however, and now support Lilypond, Graphviz and Gnuplot. TIPA has been added; as well as go, chemistry, Feynman diagrams and even Tengwar.

The long-term strategy of WikiTeX is incorporation directly into the Zend engine, so as to allow direct invocation of WikiTeX from within PHP; or even as an Apache handler, so as to handle markup immediately.

WikiTeX has been ported from PHP to C for that very purpose.