There are lots of open source IDE tools but are any suited
to porting to FreeMint ?
As Jo has pointed out, you need a lot of GEM specific stuff. Plus, as Mariusz has pointed out :), the coolest IDEs are Linux/Windows specific anyway so I'm fine using powerful tools on another computer. For me, I'm happy to have time to develop something for Atari at all, so why bother spending time on something which would be usable a) for me b) for five other people :) Better create something for the masses (read: the other five people :D)