3D-Analyze is a tool for transform and lightning hardware emulation. So it is very useful for running TnL games on video cards that have not on board dedicated circuits for TnL calculations (like all Voodoo, Kyro, some Radeon and older). It uses power of central processing unit to do emulation.
Older and current packages, release notes and tutorials are available to download here.
Note: with 3D-Analyze v. 2.31 author has readded Windows 9X support.