http://www.planeshift.it/
I have played little bit of this, it is bit like my Volvo mod, not ready at all, but it has some great potential, you may like to check forums of it before you start as it is not as simple as get in and bash those monsters, there is some issues but even more there is somewhat strickt rules, but I must say that I like it, a lot actually, it is more like getting friends and being there than leveling up, also it can take your freetime really well
Better go to sleep now
lol
