Zuul is a trunk gating system developed for the OpenStack Project.
To get the latest code, see: https://github.com/openstack-infra/zuul
Bugs are handled at: https://launchpad.net/zuul
Code reviews are, as you might expect, handled by gerrit. The gerrit they use is http://review.openstack.org
Use git review to submit patches (after creating a gerrit account that links to your launchpad account). Example:
# Do your commits $ git review # Enter your username if prompted