Phabricator is a open source collection of web applications which make it easier to write, review, and share source code. It is currently available as an early release. Phabricator was developed at Facebook.
Phabricator is a suite of web applications that help teams communicate about software effectively. It was developed at Facebook, and is used by more than 500 engineers to review, discuss, track and share changes every day (maybe fewer on weekends and holidays).