G.ho.st stands for Global Hosted Operating System and works like a Virtual Computer that runs on your browser. It is still in the Alpha stage so it might be very buggy.
Actually, it is. I’m having a hard time shaking off the browser as it resizes whenver I move the mouse around. There’s not much apps inside there — just a browser, the file managers, RSS reader, sticky notes, a clock, calculator, Ghost notes, etc. Everything seems to run on the Flash platform and its a bit slow on mouse events (well, it really depends on your broadband connection).
Similar the the earlier eyeOS (which, btw, is much more developed now), it’s still a fun thing to try out.