Here are a few that I found today:
The independent media center uses Mir is an Open-Source content managment system.
The Boston Indymedia Center runs on dadalMC.
dadaIMC also sports a new "license" section, allowing the author to specify a distribution license, selecting from public domain, standard copyright, or one of the Creative Commons licenses.The Wes Clark Community Network used Scoop. Here's an interesting one, publicaccesstv.net.
Hey look, demand media runs on Scoop too!
DV Guide at dv.open4all.info:
The goal of this project is to create a content sharing platform consisting of contributors and corerspondents recruited from young audiences and students distributed throughout the global mediascape who are engaged in direct reporting via collective production of Internet and broadcast news clips.via [ unmediated ]
Rob found The Free Network Project.
Jeff Jarvis informs us that goskokie just went live. It uses geeklog.net
Marc Canter says Drupal is his CMS of choice.
Do you have an open source content management system that you like?
I'm looking for one that would allow for the uploading of articles, photos and video.