Grafx2 is also very much like Deluxe Paint if that's your thing. Moving from Deluxe Paint IV to Grafx2 was pretty seamless for me for that reason. I'll note th

Grafx2 is also very much like Deluxe Paint if that's your thing. Moving from Deluxe Paint IV to Grafx2 was pretty seamless for me for that reason. I'll note that it's probably best to run an old release (the 2.3 version that ships with Debian is OK) or build from master at this point, because there were some bugs in the 2.5 release that I couldn't get over. The project maintainer is very active and quickly accepted my patches, though. The software is also pretty interesting from a developer's perspective. It has basically grown organically for 20 years, originally starting out as a freeware closed source Deluxe Paint clone for DOS. The source code reflects this, and there is some low hanging fruit ripe for improvement.