Planner is a free project management application, maintained by
Imendio.

If you want to contribute to the project, please subscribe to the
Planner development mailing list. Send an e-mail to
"planner-dev-request@lists.imendio.com" with the word "subscribe" in
the body of the message.

There is a mailing list archive available at
http://lists.imendio.com/pipermail/planner-dev/

There is also a #planner IRC channel on irc.gnome.org.