Free Sky, a simple, multiplayer space shooter is a work in progress that I've been coding for less than 25 days. It's buggy, not terribly pretty, but its ours damn it!
You can play Free Sky by clicking the link from the right-hand menu where you click 'Access Grid 2.0' to get on the grid. Playing Free Sky will require a little web plugin called Unity, thats light and quick to install.
Give us your feedback in this thread, and I'll keep you up to date as we improve the way it looks, works and flys.
Enjoy ... in 3D!!!