Labyrinth Lord by Daniel Proctor is an excellent modern rendition of old school gaming. To be honest, I had to look up both open game content and Open Game License.
Neither of these concepts diminish Labyrinth Lord in any way. It calls itself “a retro-clone”, but in many ways it is a restoration of past works of fantasy and art. This is the wonderful world in which I had so many adventures. There was a sense of mystery and wonder, endless possibilities.
I can’t wait until the rain stops and I can gather the kiddos for a game of possibilities.