Stretchpack is a free pack of three VST plugins for sample and time stretching from Wok Wave.
STRETCHA is an extreme time stretching plugin for sample files, playing them up to 100 times slower for drone and ambient effects.
STRETCHBPM is adjusting a WAV sample loop to a new BPM tempo.
CHIPPER is similar, but for drum loops. It is a drum slicer intended for tempo adjustment with some extra effects, like limiting the playback range or playing the loop slices backwards without reversing the sound.
Available for Windows as 32bit VST.