From Metafilter:
OldVersion.com bears the motto “newer is not always better.” This virtual graveyard/archive of older windows programs lets you stick to versions of programs before they had advertising, before they had Digital Restrictions Management, and even those that no longer exist *sniff*. I can tell sites like this will be coming in handy as we enter a Matrix-like world of advertising, spy-ware, and DRM baked into everything, while a holdout of luddites stick with 0.9 betas of their favorite programs.