This tool takes audio files and provides flexible granulation options on the file, including grain density, grain length, play rate for buffer playthrough as well as individual grains, and panning. An example file is included.
Requires SuperCollider. Download (free and open source) at https://supercollider.github.io/. To run, after opening the file in the SuperCollider editor, press [Cmd+Enter]. The interface should then pop up.