OpenCI  

With OpenCI ( CMS ) you can handle all your clan tasks like wars , news and so on. It comes with an warplaner, calendar, news-, template-, rank-, medal-, ribbon- system and much more! OpenCI comes with 2 different template systems one for the intern area and one for the public area. That allows you to run and manage your whole clan site with this php clan management too!

Hosting Requirements: Unix, Win NT
Database: MySQL
Price: Free (GPL)

   EQdkp  

EQdkp is an Open Source DKP system created out of necessity. Many EverQuest guilds wanted to use the point system but didn't have the means or time or will to create their own program for managing it. The main focus of EQdkp is to make loot distribution decisions as easy as possible for guild leaders while still allowing the system to be easy to maintain.

Hosting Requirements: Unix, Windows
Price: Free