VOCALOID - VOCALOID is a singing synthesizer.
Second Life - Second Life is a virtual reality platform where individuals interact in a virtual world. The software was developed in 2003 by Linden Labs. More than one million people now regularly use the software.
UTAU - UTAU or Vocal Synthesizer Tool UTAU is a voice-synthesis software developed by Ameya/Ayame and made...
Movie Star Planet - Movie Star Planet is an Online Virtual World, MMO, and RPG Simulation by MovieStarPlanet.
DeepVocal - DeepVocal is a free to use singing synthesizer application software developed by Boxstar.
MySims Kingdom - MySims Kingdom is based upon The Sims series but provides special and extremely different gameplay to the original series making it definitely worth your consideration.