IMVU is an online virtual world and social networking site. Members use 3-D avatars to meet new people, create, chat, and play games. In 2014, IMVU had approximately 6 million active players, and had the largest virtual goods catalog of more than 6 million items.
Second Life is an online multimedia platform that allows people to create an avatar for themselves and then interact with other users and user created content within a multiplayer online virtual world.
Second Life users, also called 'residents', create virtual representations of themselves, called avatars, and are able to interact with places, objects and other avatars. They can explore the world, meet other residents, socialize, participate in both individual and group activities, build, create, shop, and trade virtual property and services with one another.