FlightFeather

FlightFeather's goal is to allow the creation of social sites, which require minimal resources. 

Whenever the system's state changes, FlightFeather generates static HTML pages.  The webserver then returns these static pages in response to pure read operations (FlightFeather does not run at all for reads). FlightFeather has not been developed since 2007, but you can download FlightFeather from the project's SourceForge page