No, currently - Snap.as ( https://snap.as/ ) doesn't seem to be open-source and is only available (as a service) if you have a paid Write.as account ( https://write.as/pricing ).

I tried looking at the Snap.as repo ( https://github.com/snapas ) and Snap Freely organization ( https://github.com/snapfreely ) on GitHub, respectively; but both seem empty.