Melody is an open source content management and publishing system derived from the popular blogging tool Movable Type. Recently they announced their first release candidate has been made available.
From the announcement:
We are excited to announce that Melody 1.0's first release candidate it ready for download and use by the general community and outside world. A number of us have been using Melody for quite sometime with nary a hiccup, and this latest build is without a doubt the most stable build of Melody, and arguably Movable Type 4 to date. It has lots of bug fixes and even some minor features here and there, all of which are well documented in our release notes.
For more info or to download the release candidate, visit Melody CMS.