Realtime mesh deformation on collisions. Meshes can be selected individually, or let the script takes all of them. Customizable deform settings.
Realistic Mesh Deformation has the same deformation methods used in Realistic Car Controller. More customizable and more stable version. Can be used on any object, but wireframe topology must be in good condition.
WebGL, Android Demo
Just attaching it to the gameobjects you want to deform would be enough!