[kubb]

Thanks for your detailed response, it's excellent and so kind of you to give me such detailed suggestions. I feel I have to check out every single one of these systems. I only knew Pathfinder and Dungeon World.

I like the idea of the OSR systems with small rulesets. So I'll check The Black Hack first. Do you know about any systems like this one that have been published under the Creative Commons license?

[andolanra]

The other one I mentioned—Maze Rats—is licensed as CC BY 4.0, so that might be a good place to start! (The Black Hack is licensed under the OGL 1.0, which unfortunately means it's not immune to the whole mess that this thread is about, but I'm hoping that a lot of the creators who put stuff out under the OGL 1.0 either come up with a new license that's not associated with WotC or relicense their stuff under something like a CC license. I guess we'll see!)