NI Reaktor: A complete audio toolkit
The audio plug-in software framework “Reaktor” by Native Instruments is one of the most flexible single units you can have in your virtual rack. Within Reaktor there’s an impressive array of preconstructed “ensembles” like synthesizers, samplers, rhytm units, sequencers, pattern generators, effects units, utilities and much more. And on the vivid Reaktor community you can download endless user contributions that perform their special task.
Reaktor enables you to build your own audio processing devices from a wide range of basic building blocks. While not for novices and impatient types, it is not completely inaccessible.