SourceCodeKit is a wrapper for libclang, which is “a set of C APIs expose the functionality that an IDE might want. The libclang APIs let you do a lot of things, including reporting diagnostics (errors, warnings, and so on) in an editor, code completion, and so on. The first thing that I decided to work on was synta highlighting. …” (source: http://etoileos.com/news/archive/2010/10/15/1401/)

Repository: http://svn.gna.org/viewcvs/etoile/trunk/Etoile/Languages/SourceCodeKit/