http://osgameclones.com/
Recently I found this website, which contains a neat list of old games with open-source reimplementations. What I like about it is that it prominently shows the development state (how active, language used, repo link) so if you were thinking of contributing to a project, it's very easy to decide.
It's available on github (http://github.com/piranha/osgameclones/) so it's easy to update, just fork and update the YAML.
And yes, C-Dogs SDL is listed