Code: https://github.com/integrity/integrity
Docs: http://integrity.github.io/
Bugs: https://github.com/integrity/integrity/issues
IRC: irc://irc.freenode.net/integrity
Mailing List: integrity@librelist.com
Archives: http://librelist.com/browser/integrity/
NOTE: The website, integrityapp.com has been abandoned by the original owners, and I am unable to resolve that.