Make sure you have a fairly new/fairly high-end computer or these will not run very well or look like the screenshots below:

VirtualStudio_Shot2
VirtualStudio_Shot1
First Link is for a browser version. Once downloaded, unzip and doubleclick the RT_Studio_Test.html file:
Rt_Studio_TechDemo
Mac Standalone:
RT_Studio_OSX.app
Windows Standalone:
RT_Studio_Windows