Active Worlds. (AW)   To explain more simply, what it is, visualize usual browser, for instance NN or IE, so here is AW - the same browser, only 3D and with the possibility 3D  chat.
What main differences AW 3D browser from the usual browser:
Main that this 3D move on the world, which you will choose. Moreover these worlds, if compare with levels I at least or Quake-2, much more, varied and more beautiful.
You may talk with one,simultaneously uses AW browser and bases in one with you world.
Here possible create their own buildings, in which you may put (deliver) an own photography, can put (deliver) a tablet with link on your Home Page, i.e. roughly speaking do its Home Page in the manner of 3D building with references.
Possible listen a music in MID format and WAV sounds, moreover with 3D effect, i.e. than from the source of the sound further, that more silent.
At the talk with your opponent you its not simply hear, as well as see its in the manner of different 3D entailments. (Moreover be feminine, male appearance, also appearance different animals).
Majority of appearance possess different motion.
Download AW browser And having installed its, you fall into incomprehensible world... The First that you see - a heap of small black triangles. Nothing amazing, say I you: deal all in that that, until will be loaded majority of three-dimensional textures, you so be it observe these the most triangles. But does not afraid, this not so and long will.

P.S.  You can visit russian language page about META ACTIVE WORLD
But have and another WORLD`S ...for example click here for english or here for russian language