An ancient world, revived from dusty files lying dormant and entombed within a mega-corp's forgotten server: FreeSO (for “Free Simulator Online”) is a project from "Rhys", a full-time student and semi-anonymous developer, who's created a way to make Electronic Arts' long-discontinued Sims Online MMO re-playable once again:
First, you need to install the original game. This is still available from EA’s servers at http://largedownloads.ea.com/pub/misc/tso/ (though it may not be for long!) After this, you should download the latest build from our buildbot at http://servo.freeso.org...
On its own, the FreeSO client does not display any copyrighted material, and is not distributed with it. The game files are provided by the user, and the client simply reads the files the user provides. In this sense, our replacement client is essentially a glorified The Sims Online™ file reader, as all original graphics, sounds, UI layouts and game objects are simply read and simulated by the client. The game server transmits metadata generated from the execution of these scripts (avatar money values, lot/object state, avatar appearances, hash of game files for version identification) but does not transmit any copyrighted material either.
You might think there would be little or no interest in a virtual world which had its heyday some 15 years ago (it was on the cover of Newsweek in 2002), but you'd be wrong -- the game has crashed from overwhelming interest: