Freshmeat page: http://freshmeat.net/projects/acspg/
The ArsDigita Community System ported to PostgreSQL. OpenACS (Open ArsDigita Community System) is an advanced toolkit for building scalable, community- oriented web applications. If you're thinking of building an enterprise-level web application, OpenACS is a solid, proven foundation that will give you a 3-6 month headstart.
This project has the following developers:
New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.
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If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!