Documentation and example projects are included in the download package.
Download the latest version of FastGrav:

FastGrav v0.9.0 for Windows

FastGrav v0.9.0 for Mac

...or use this Google Drive link.

Please contact me directly with bug reports, feedback, or questions. I appreciate your help in improving the software, and I can respond to small issues quite quickly.
If the download links are not working for any reason, try this Google Drive link, or email me. I can send you the software directly.

Including the word "FastGrav" in your subject line will ensure I see your email as quickly as possible.