kaliClient is a raider mod used by Kali Compton (Kalecgos) for distributing loot in 25-man instances. The raid leader uses kaliClient's server mod (kaliDKP) to track individuals' DKP and auction items. When loot drops, the raider leader starts an auction which initiates a graphical interface for all clients allowing the user to choose how much to bid on the item, up to their current maximum DKP. Item and DKP data is automatically synced to the clients.
For more details, see kaliDKP.

