Internet Relay Client
Polari is a good starting point for newcomers who want to contribute to GNOME. You will often find either Bastian Ilsø (bastianilso) or Florian Müllner (fmuellner) on the #polari IRC channel at irc.gnome.org, who can help you out.
Finding a task
To find something to do in Polari, simply pick a bug from this list of newcomer bugs:
List of newcomer bugs
To build Polari you can follow the newcomers guide on building GNOME apps.