Tallifer
Hero
[MENTION=6686908]As for a retro-clone of 4E that is like OSRIC, rebuilding the edition as far as legally possible under OGL, I've tried to start a project called 4SRD but it currently suffers from the problem that I have zero free time to spare. Help is welcome.
I have started adding stuff, but wow it is a lot of work. And I think it will not be difficult to make it OGL, but it will be a lot of drudgery to do so: so far I simply entered a bunch of rules and racial feats, but I was not very careful yet about OGL considerations.