Yesterday I searched for PE EXE packers. UPX is certainly the best known candidate, but it has a quite restrictive license when it comes to changing the loader code or preventing unpacking of the compressed EXE somehow. After digging through some commercial tools like Armadillo (which features were impressing!) and shady tools like morphine which are usually used to hide trojan horses, worms and the like, I found PackMan – a nice packer with source and dedicated to the public domain.