I am working on a nonogram (aka griddler, paint by number, picross, hanjie, etc) app for Ubuntu Touch.
Along the way, I’ve discovered that there are very few freely distributable puzzles floating around.
In an attempt to change that (for myself and future app developers), I’m collecting the ones I can find in one place.
If anyone knows of any good caches of freely distributable puzzles, please let me know and I’ll add them.
In the meantime, I’m going to strip files from the few open source apps I know about and see if I can get members of some popular nonogram sites to release their puzzles under a free license.