LibreSprite – fork of last open-source release of Aseprite pixel art editor
Glad someone is doing this. The author pulled a bait and switch and got away with it because the software wasn't really a community project to begin with.  The switch happened right after I spent a good amount of time getting Aseprite's finicky build system to work so I could package it for a distro.  If I had known the author was going to betray the users I wouldn't have bothered.After that I learned about Grafx2, which is free and pretty featureful: https://pulkomandy.tk/projects/GrafX2