Catznip Second Life Viewer - Catznip is graphical client for Linden Lab's user created 3D virtual world, Second Life.
Second Life Viewer - Download Second Life from the official site here.
Radegast - Display Homes And Buildings
Kokua / Imprudence - Kokua is an open source viewer for Second Life and OpenSim-based virtual worlds.
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.
IMVU - IMVU is multiplayer online video game created by ‘IMVU Inc’.