The Federated Wiki community has been developing such tools for more than a decade. We are now extending the FedWiki to provide an open source platform for neighborhoods.
We must provide a set of usable tools for creating the necessary and sufficient models for neighborhoods. They must include the ability to explore Change Over Time in complex (non-linear) systems that are the nature of all social systems.
Logically these tools start with a list of the **parts** of the neighborhood. Next add relevant **relationships** between the parts. Then adding the ability to recognize the effects of **time** on the **behavior** of the system. And then allow that neighborhood system to be changed through new **conversations**, new **processes**, new **projects**, or even new **programs** that are conceived of and initiated and managed **by the people** in the neighborhood.
That requires some pretty clever technology. It requires some attentiveness to Social Systems, sociology, and Political Systems.