5ced8212_World_Building_Tools__Tools_used_to_create_a_world
[Virtual world environment] Active Worlds [Tools used to design avatars] No avatar maker is included but if you become a caretaker of your own world you can design your own avatar using tools like LifeForms from Credo Interactive. [Tools used to create a world] 
You can build in the common AlphaWorld space using the selection of "Leggo" objects. Circle of Fire offers world servers for sale, in which case you can create your own world and its avatars.
World Building Tools
Tools used to create a world