We have very few required add-ons or external programs. Additionally, these programs are only required if you plan on raiding with us.
We use Ventrilo (hereafter referred to as `vent' for voice communication and during our 10- and 25- man raids. Additionally there are several channels that members and friends can use during 5-man instance runs as well as during PvP.
In addition to our raid, party and PvP channels there are several social channels.
`vent' can be downloaded from here. Make sure that you get the client version 3.
Omen is our standard threat-meter that is used during raids. This add-on shows every party members threat on the target. This add-on will save your life as letting you know when you are getting two close to the tanks aggro level.
The current version of Omen is available here