The most versatile and powerful CCK for Joomla
The most beautiful part of FLEXIcontent is the templating mechanism which allows to render each Joomla article uniquely.
Object-oriented grounding provides bunch of ways for integrating FLEXIcontent algorithms into third-party components. In addition, it is easily extensible with plugin mechanics.
I would especially like to thank the developers who put incredible effort in constantly improving the extension and providing abundant support on their forum.