DX Ball 2
A neat little Breakout game with additional level packs for 5 bucks each. Released in 1999.
Gene-Rally
A freeware top-down racing game similar to Slicks 'n' Slide. Comes with mod support and a track editor. Released in 2002.
My Abandonware
The best site to find old games for free.
Ragdoll Software
A single developer based in Italy who makes fun physics-based games.
OoCities
A rather large archive of GeoCities sites.
TaigaNet
The home of an incredibly well-coded WeatherStar 4000 emulator.