Your Space Account
Space is a virtual world with a number of components;
The live server; http://sine.space/
The preview server; http://staging.sine.space/
The creator portal; https://curator.sine.space/
Creators uploading content to the platform use the Unity3d game engine; https://unity3d.com/get-unity/download
With the Space Editor Pack installed; https://curator.sine.space/editor_pack