I sometimes play the BSD games (boggle, mille, and others). There is also ZZT and Free Hero Mesh, but those are engines with different licenses for different g

I sometimes play the BSD games (boggle, mille, and others). There is also ZZT and Free Hero Mesh, but those are engines with different licenses for different game worlds. A few ZZT games which are free cultural works. But for both engines, games can be made with any licensing.