Warbringer
Explorer
13th Age? The game is marvellous, but the OGL was pushed much, much further than that, long before that. Mutants & Masterminds, for example, is far more of a push than 13th Age. As was Spycraft. Or our own Four Colour to Fantasy or Elements of Magic. 13th Age is pretty tame compared to what some folks have done with the OGL.
True, and all good games.