Construct3D is described as 'The home for everyone. Construct3D provides one of the best virtual experiences using the latest in 3d technology anything is possible in Construct3D! Now with XBOX 360 support with the KINECT Camera you can build with your hands!' and is an app in the Social & Communications category. There are eight alternatives to Construct3D for a variety of platforms, including Online / Web-based, Mac, Windows, Android and iPhone. The best alternative is Minecraft. It's not free, so if you're looking for a free alternative, you could try Roblox or Second Life. Other great apps like Construct3D are ActiveWorlds (Free), CrossBrowdy (Free, Open Source), IMVU (Freemium) and Habbo (Freemium).
Minecraft is a sandbox game that revolves around using building blocks to create anything you want. At night, monsters come out; make sure to build a shelter before that happens. The game also has multiplayer capabilities.
Roblox allows you to create games, build whatever you want with lego-like bricks, play other games made by users of the community, and even participate in the economy by trading, selling, buying, and collecting items.
Second Life is a free 3D virtual world where users can socialize, connect and create using free voice and text chat. To access this world you need to use a viewer such as Second Life Viewer (see Second Life Viewer).
Activeworlds hosts a Universe of over 500 3D virtual reality worlds. In these worlds you can choose from a vast array of avatars that fit your personality (or your perceived personality - that's half the fun!).
Smeet is a virtual 3D World, where you can create your Avatar and your own Room. Start now and meet new friends, flirt, organize your party, share pictures and videos! Smeet is available in English, French, German, Italian and Spanish