Mir Vadim has released RayFire for Unity, a useful destruction kit plugin originally created for 3DS Max.
The Unity version lets users infinitely demolish 3D objects at runtime and preshatter items in Edit mode. The tool features several fragmentation types like regular voronoi, wood splinters, slabs, radial, slicing using planes and tetrahedral.
Using Clustering users can simulate and break them as more complex concave shapes. The tool also brings Advanced Dynamic Simulation Control over simulated objects and demolished fragments such as activating them at a specified time. What is more, you can shoot, explode and affect fragments by wind and vortex forces.
You can learn more and get the tool here.