Ancient Greek Text Manager
I saw this on a link thru the TextKit website. Maybe it's of interest to some of you. It looks like it's still in development and I must admit I haven't played around with it much, but it looks quite promising. In order to download the program you need to personally email the guy who's coding it, but it's free of charge, he just doesn't want it to be distributed by others. Anyway, check it out and see what you think.
MA Classics Student Washington U
MDiv Student Concordia Seminary