X-VP, formerly known as the X Engine, has been renamed to X-VP and will continue development under Soular Souls Studios. X-VP is functionally identical to the X Engine with the exception of the name. In fact, the only reason for the name change was to avoid confusion in the developer community between X-VP and other similarly named projects on the internet.
Extensible Visualization Platform TM (X-VP) is a powerful, extensible and easy to use 3D graphics visualization toolkit. If you haven't checked the progress of the engine in a while, you'll notice the addition of new demos and an F.A.Q. The new home of X-VP is www.soularsouls.com