Polyhedron too. This is apparently controversial and violating some copyrights, so follow your own conscience, but examiner.com has this piece outlining the issue and linking to the specific archive.org repositories for these. This is a pretty amazing walk down memory lane, and a nice workaround to the impossibility of otherwise acquiring this material. TSR or someone they licensed to do it actually sold a physical media collection of all of this, which I used to fondle in the gamestop at the Maine Mall now and then. It was north of $50, which was a lot of money to me back then so I never ended up with it, though had I known it would end up being worth hundreds because of how hard it is to come by a copy I might have found a way to come up with the money. Anyway, enjoy a little nostalgic tour of pen and paper RPG history if you’re so inclined. If you don’t want to read the piece itself, the Dragon Magazines are here and here’s the Polyhedron repository.
[edit: links removed. No more controversy – they had to remove this material. Evidently it was violating copyright]