Pure Data is described as 'Pd (aka Pure Data) is a real-time graphical programming environment for audio, video, and graphical processing. It is the third major branch of the family of patcher programming languages known as Max (Max/FTS, ISPW Max, Max/MSP, jMax, etc' and is an app in the Development category. There are more than 25 alternatives to Pure Data for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is VCV Rack, which is both free and Open Source. Other great apps like Pure Data are SunVox (Freemium), SuperCollider (Free, Open Source), Max/MSP (Paid) and Reaktor (Freemium).
VCV Rack is a modular synthesizer inspired by Eurorack systems. It acts a host for virtual modules which perform various audio processes. E.G. oscillators, filters, envelope generators, sequencers and more that can be connected freely in almost limitless combinations.
SunVox is a small, fast and powerful modular synthesizer with pattern based sequencer (tracker). It is a tool for those people who like to compose music wherever they are, whenever they wish. On any device.
Interactive visual programming environment for music, audio, and media
Max/MSP vs Pure Data opinions
pros, cons and recent comments
Solid features for new folks as well as seasoned ones. Great help and reference documentation for objects and lots of integration possibilities including midi, Osc and tons of others. Vibrant user community.
Native Instruments Reaktor is a virtual, modular synthesis platform. REAKTOR also provides a platform for modular synthesis in the form of Blocks – a range of sound generating and sound shaping modules.
vvvv is a graphical programming environment for easy prototyping and development. It is designed to facilitate the handling of large media environments with physical interfaces, real-time motion graphics, audio and video that can interact with many users simultaneously.
TouchDesigner is a complete authoring tool for building interactive 3D art, visualizations, prototypes and UIs. Derivative makes and supports TouchDesigner and offers their services to do custom production using TouchDesigner.
openFrameworks is an open source C++ toolkit designed to assist the creative process by providing a simple and intuitive framework for experimentation. The toolkit is designed to work as a general purpose glue, and wraps together several commonly used libraries, including: