JS++ is available online for free. It is currently in a preview at version 0.4.1 for early adopters.
Still, Poon remains confident that JS++ has what developers want. “Developers don’t want their types erased at runtime. Otherwise, it’s just labor-intensive to declare them at all when thousands of them can be incorrect on every tenth run of the application,” he said. “Instead, developers want type guarantees. Essentially, to use the vernacular, they want a sound type system. Our patent-pending technology is the solution here.”