DSPnano version 2.0 is the current open source version. DSPnano 2.1 is the current commercial version. Even though these version numbers are close, version 2.1 has a huge increase in features and could easily have been called 3.0.
DSPnano has been ported to: M16C, R8, PIC24, and dsPIC33. These ports cover hundreds of MCUs and hundreds more are a very easy port of the chip support package.
Hardware and tools are available to volunteers willing to do ports. Test suites are proprietary RoweBots property.
If you need a port, you can get a commercial port for the cost of a single product license, and have the single product license included in the fee - essentially a new port.
If you want to do a port yourself, sign up for a porting project by contacting us and everyone will have access after it completes testing.