Accio is a scientific workflow management tool, used to study location privacy. It comes from a group of researchers from the LIRIS (Lyon, France) and University College London.
Most of the development is done inside the master branch (with the exception of some experiment/major features that might be developed in their own branch), which means that it might unstable. Stable code can be found under the release-* branch, which are cut once a release approaches readiness, and used for further maintenance of a minor version.
Accio is licensed under the GNU General Public License, Version 3.0: https://www.gnu.org/licenses/gpl-3.0.en.html