If you are working professional with biger projects Joomla! Sites and Portals like me, then you need a full functional projectmanagement. this component should be your first choice. it's absolutly professional in design and function.
thanks to giving for free...
Maybe becomes the K2 CCK for the future some functions more, but for a non-commercial software ist this at the moment one of the best joomla extensions.
The new SimpleLists plugin-architecture makes it possible to write a simple "SimpleListsLink - SOBI2" plugin for this. If somebody needs help programming this, just give us a call and we will assist.