Reaktor

Reaktor is a graphical modular software music studio developed by Stephan Schmidt and Volker Hinz as founders of Native Instruments (NI). It allows musicians and sound specialists to design and build their own instruments, samplers, effects and sound design tools. It is supplied with many ready-to-use instruments and effects. In addition, free instruments can be downloaded from the User Library. All of Reaktor's instruments can be freely examined, customized, or taken apart, encouraging reverse engineering. The free, limited version called Reaktor Player allows musicians to play NI-released Reaktor instruments, but not edit or reverse-engineer them.