RayFire is described as 'Fragment, destroy, demolish, wreck, break down, wreak havoc, blow up, burst, detonate, explode and do other similar things you have always dreamed of to do in Max'. There are seven alternatives to RayFire for a variety of platforms, including Windows, Autodesk 3ds Max, Autodesk Maya, Linux and iPad. The best alternative is Autodesk 3ds Max. It's not free, so if you're looking for a free alternative, you could try Demolition Master. Other great apps like RayFire are 3DSimED (Paid), Pulldownit Pro (Paid), Thinking Particles (Paid) and FumeFX (Paid).
3DSimED is a Windows DirectX application allowing the creation and visualization of models from many racing sim formats. Models can be exported to Assetto Corsa, Automobilista, rFactor 2 (and 1), GTR2, Race 07, GTL, N2003 and many other games.
Demolition Master is a 3dsmax tool based on Thinking Particles for make quick, and easy destructions. I provide a 3dsmax scene, with Demolition Master on it, all debries already connected and FumeFx setup.