_(KOS | http://kos.enix.org/) is a small project of developing an *(OS) being worked on by a few French people. Like _(LittleOS), it seems to be a nice little project to work on if you're interested in _(OS)es and want to hit the metal, but don't know where to start. Development was slow in late 2002, but started again in the middle of 2003. Note that the site has some pretty interesting _(OS) documentation as well.
