PaulXStretch – free VST2/AU Plugin for extreme time stretching and other spectral processing of audio, This plugin is based on the PaulStretch algorithm/standalone app. (Paul’s Extreme Time Stretch.)
Stretchpack is a free pack of three VST plugins for sample and time stretching from Wok Wave.
Paulstretch is a time-stretching of audio designed for extreme stretching. While the most time-stretching methods produces artifacts on extreme (like 10x) stretches, Paulstretch produces high quality sound even at 1000x stretches.