[http://silvercity.sourceforge.net/ SilverCity] "''is a lexing package, based on Scintilla, that can provide lexical analysis for over 20 programming and markup langauges''". Can be used for TracSyntaxColoring.

Version 0.9.5 recommended. 
Version 0.9.6 [http://projects.edgewall.com/trac/wiki/TracFaq#why-is-my-css-code-not-being-highlighted-even-though-i-have-silvercity-installed doesn't work] with Trac.