Torque has been around for a while, and it's been used for everything from driving simulators to MMOs to interactive coral reefs. Still not convinced?
When you get Torque, you get everything. Under the permissive MIT open-source license, you can do what you want with the source code.
Torque is being constantly developed by an enthusiastic community. Its future is in our hands, not those of a company with a bottom line to meet.