HarvestTools is a part of the Harvest software suite and provides file conversion between Gingr files and various standard text formats (see Harvest).
HarvestTools is normally distributed as a binary for OS X or Linux (see Harvest link above). However, the source is provided here for unique build environments or for development.
CITATION provides details on how to cite HarvestTools. INSTALL.txt provides instructions for building from source and installing. LICENSE.txt provides licensing information.