An application server built upon the Pyramid web framework. It provides a user interface for managing content as well as libraries and utilities which make it easy to create applications.
See the documentation at http://docs.pylonsproject.org/projects/substanced/en/latest/ for more information (docs may be broken while in development).
The mailing list exists at https://groups.google.com/group/substanced-users
The code exists at https://github.com/Pylons/substanced
The IRC channel is at irc://freenode.net/#substanced