you may find these useful:
http://nixbit.com/cat/text-editingpr...g/ides/pikdev/
http://www.micahcarrick.com/04-19-20...ing-linux.html
for the first link, I didn't link to the actual project page since this page contains links to other pic IDEs.
if you didn't already know, you could use eclipse with mcc18 fairly easily (i think there is a guide on the wpilib website)
also look at some of the adambots stuff ( i think mentioned above).
good luck.