Algodoo

A target for use with guns, swords, hammers, whatever. You name it, you can hit this target with it.

Unless the target actually has pieces removed, say by deleting, cutting, erasing or having a killer touch it, this target will always reform perfectly after a few seconds. You can even get a large object, drag it around on the target, and totally destroy the target with it, and it will reform after about 5 seconds.

There is one bad thing about the target though. It is very laggy for a target. On my computer it drags the sim speed down to about 50 - 70% real-time. It might not for you, but just a warning, it could make your computer lag.