MultiAPIsyntax is a project mainly written in ..., it's free.
Syntax for Qt, KDE, wxWidgets, GTK1, GTK2 libraries
This is a mirror of http://www.vim.org/scripts/script.php?script_id=1084
This is a new version of former script vimscript #787. This script scans Qt 3.x, KDE 3.x, wxWidgets, GTK 1.2.x and GTK 2.x headers, then creates vim syntax file (cType definitons for all classes/structs) for highlighting and plain list of classes for vim word-completion (for use with vimscript #213). multiAPIsyntax supports command line options like --qt, --kde, --wx, --gtk1, --gtk2, so you may choose which libraries to scan.