A List is a List is a List - Tweaking in Progress

Well, I think I'm going with:

Free OSR RPGs (derived from D20 / earlier versions of D&D)

Free Classic RPGs (GURPS / Traveller / Runequest / Gore / Lost Souls and the Like)

Free Modern RPGs (Risus / FATE / PDQ and the like)

When I get the chance I'll try and group within each list by genre.

Once this damn list building is done, I can get back to reviews, the next RPG "porn" release, funky dice and all the other stuff that seems to stir the shite on the interwebs ;)