TR64 (True Reality 64) is the Windows OpenGL port of the True Reality project - a collection of emulator for number systems including MacOX. It is one of the most promising emulators out there, but after the team decided to have a 'vacation' period of coding, little was heard from them. Saying that, releases are not non-existant and icepir8 continues to work without rest on his OpenGL plugin.
Required:
K6-2 450Mhz
64MB RAM
D3D or OpenGL video card