KAstrometry was supposed to be a Astrometry program. It has been abandoned. Some of the code has been reused in AstroBuffer. AstroBuffer may one day in the distant future get astrometry features.
Radu Corlan informed me of his project gcx, if you are looking for a more finished project that has some similar goals, I'd check it out. http://astro.corlan.net/gcx/
Version 0.01a (not really functional but runs):