Plone is powerful and flexible. It is ideal as an intranet and extranet server, as a document publishing system, a portal server and as a groupware tool for collaboration between separately located entities.
SAPID CMF is a framework for rapid creation of content-based application of Web 2.0 generation. SAPID CMF allows to organize effectively process of new application development, data, structures, representation and functionality components reusing, rich user interfaces creation.
New 
TWiki is a flexible, powerful, and easy to use enterprise collaboration platform.