Theron in five points
Theron is a C++ concurrency library unlike most others. Its foundations on the Actor Model make Theron an intuitive and productive way to write parallel and distributed applications.
Anyone who's tried to write large parallel applications using traditional shared memory thread synchronization knows that it quickly becomes a headache.
Theron side-steps mutexes and locks by rephrasing parallel programming as asynchronous message passing between natively concurrent objects.