Phabricator

Phabricator (pronounced like the word fabricator) is a suite of web applications which make it easier to build software, particularly when working with teams. Phabricator is largely based on Facebook's internal tools.</p>

It has been more than three years since I have been using Phabricator (self-hosted) at work. It is one of the open-source projects which has inspired me a lot. I have seen it grow over these years; every day it gets better. Thanks to hundreds of open-source developers for their contribution.

Want to see how to develop elegant and sophisticated software, even with a poor programming languages like PHP? Look at Phabricator's source-code and tools (built using PHP), you would be awestruck.

Want to play with Phabricator without installing? Have a look at PhorePlay (Phabricator hosting service), which offers free Phabricator hosting (with multiple instances) up to five users.  I think, that's good enough for most of us (small teams).

Phabricator's core team is working to launch Phacility (Phabricator Hosting). I think, it has potential to become something like Github (useful and essential service) one day.