3D Rad is now completely free to use for commercial and non-commercial purposes.
Development will continue as usual, funded by a donation scheme that has already produced a rich update that adds, among other features, an object called Projectile which you can use to create weapons without any scripting.
The installation file, including the compiler and all resources, can be downloaded for free at the 3D Rad website.
3D Rad is a user-friendly 3d editor with a straightforward developing workflow and ready-to-use physics simulation. You can use it to create any sort of stand-alone, interactive 3d project for Windows Vista/XP.
Ideal for CG artists and non-coders, but flexible enough to meet the needs of expert developers as well.