+All of the code for Notmuch is available as [free
+software](http://www.fsf.org/licensing/essays/free-sw.html) released
+under the GNU [GPL version
+3](http://www.fsf.org/licensing/licenses/gpl.html). The latest
+versions can be checked out via git with this command:
+
+ git clone git://notmuchmail.org/git/notmuch
+
+You can browse the [Notmuch code history
+online](http://git.notmuchmail.org/git/notmuch). A notification is sent to the
+[notmuch-commits mailing
+list](http://notmuchmail.org/mailman/listinfo/notmuch-commits) for every commit
+made to Notmuch and the notmuchmail.org web site. [The Notmuch OpenHub project
+page](https://www.openhub.net/p/notmuch) has a nice summary of the codebase and
+activity.
+
+We have a [buildbot](http://buildbot.notmuchmail.org/grid) (here's
+its
+[configuration](https://github.com/tomprince/buildbot-configs/tree/notmuch)).
+
+Contributions, such as patches, to Notmuch are most welcome. Please refer to the
+[[guide to contributing|contributing]].