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If we're mentioning other CMS's there is also:
E-xoops now known as RunCMS - based on an old branch of Xoops, worth a looking, I believe a member of XOOPS called HalfDead originally took development of E-xoops, after getting annoyed with the slow progress of XOOPS and lack of other things, not sure who it is now.
XoopsCube, for those of you whom love the original developer/creator of xoops, his work still goes on. Yep Ono is the developer for XoopsCube.
XoopsCube is relatively new, and based on one of the more recent branches and releases of xoops.
I've never really tested either of these two, I've heard a few good things about E-Xoops, and I'm sure anything Ono does will be superb.
As some of you may know Code Plus, is developed by John AKA Catz, a very good friend of mine and the ex developer/creator of the WF modules (IE WF-Sections, WF-downloads, etc, etc), this project is still in it's infancy, but after testing this system many times for Catz, I can see it will have a bright future providing continued development. You should really check out their demo version and see what you think.