Just as I was about to start lamenting the loss of a promising game, somebody steps up with a call to arms to resurrect development efforts.
Galaxy Mage Redux (placeholder site) will continue where the original Galaxy Mage team left off. They need pythoners and pixel artists so if that's you then make Santa's life cheaper by restoring a good Free game. There is already a forum and the game code is still available here.
Another project in the doldrums is Mars: Land of no Mercy (website down). It is still available from the Sourceforge project and there's a post (from August) explaining the website downtime. SVN activity indicates that whilst the site has been down, so has development.
And... what's this... 0AD, the uber-looking freeware RTS game, may actually be released under an open source license? Too good to be true? It is, really, they won't release the whole thing, "for security reasons." (I'm not a fan of security through obscurity.)
I'm being lazy, no screenshots. There are some cool shots on the 0ad website though.