Doppelmangler uses additive resynthesis technology to allow you to mutate your .WAV samples in many different ways. Timestretch, re-pitch, re-order, morph and filter your sounds in realtime, in ways that regular samplers can't.
In other news Daniel Lewis has uploaded over 150 MB of new patches for Doppelmangler including leads, pads, fx, and soundscapes. Also, Kered has put together a bank of 48 Halloween themed patches. Both of these are available from the new User area on White Noise Audio's website.