Native Instruments Reaktor 5.7.0 or higher.
Dron-e is a Reaktor Instrument specialised in creating ambient, generative, abstract and cinematic soundscapes and drones. Dron-e contains flexible parameters and controls for creating everything from delicate atmospheres to complex walls of sound. Included is a custom created sound bank of acoustic and synthetic instrument and field recordings designed specially for Dron-e , but you can load your own and venture into unknown sonic territories. In addition to the pre-established modulators and controls. it's possible to use your own modulators built in Reaktor such as sequencers or break-point envelopes using the EXT option,as well as MIDI/OSC signals to further shape your sounds.
"Dron-e is brilliant. Perfect for creating the sonic mayhem soundscape, it's a must have ensemble" Music Composer for Mass Effect 3, Tron Evolution, Borderlands series, Quake series, Prototype and many more"... http://sonicmayhem.com/