C-Liu
C-Liu (六 is 6 in Chinese) is our supported package of PHP code sets as an Aspect oriented adaptation of Drupal 6. See history for development of the concept.
The generic C六 has 2 production level application instances MyOpenProjectSpace.com, the GSIB 2.2 Community Development Site, and 1 beta concept site Drupal Timeline Based Social Networking Service (DTBSNS).
C-六 is available as free software and sold as a "codebook" service which includes our platform services and a dedicated virtual server for development purposes. In the real-world sample application DTBSNS this is the MIT SIMILE timeline widget. The paradigm of programming implicit here is that there is in fact such a single central metaphor which of course in general is not the case. Other than this simplifying assumption. DTBSNS has the complexity of a real world Drupal application using my core so you can evaluate against your requirements in that light, viz under the presumption that there will be a more complex and articulated central model.