Xfire
From 5punk Wiki
Xfire
Xfire is an app that acts as an instant messenger with in game support and allows us to easily join other 5punkers in game.
With the 22/9/06 Xfire update, they introduced a Clan function, this allows users to add everyone to their contact list easily by joining the 5punk clan here, you'll usually be accepted within 24hours.
When signing up at the forum, make sure you add your Xfire username to your forum profile, as this is the core of 5punk, and without Xfire, we wouldn't even be here.