Partikkel Audio has released Hadron. This granular synthesizer is available for free in VST and AU format for Windows and Mac OS. Hadron appeared as Max4Live instrument in 2011.
Hadron is both a synthesizer and effect. In the video below Hadron is demonstrated as an effect by manipulating the voice of the narrator. With Hadron interesting sounds can be created:
And the Hadron plug-in as a synthesizer: