"I recently released a new software developed with Qt 4 (this summer I took a chance to use qt and really enjoyed this wonderful framework): QSource-Highlight - a Qt interface for GNU Source-Highlight. You can highlight your code on the fly, and have the highlighted output in all the formats supported by source-highlight (e.g., HTML, LaTeX, Texinfo, etc.). You can then copy the formatted output and paste it (e.g., in your blog), or save it to a file..."