Vvvv - vvvv is a graphical programming environment for easy prototyping and development.
VSTHost - Hostprogram for VST-Plugins with ASIO-Support
Processing - C++ and Java programming at the speed of thought.
Cantabile - Plugin host for live performance.
TouchDesigner - TouchDesigner is a visual development platform that equips you with the tools you need to create stunning realtime projects and rich user experiences.
Blue Cat's PatchWork - Blue Cat's PatchWork is a universal plug-ins patchbay and multi FX that can host up to 64 VST, VST3, Audio Unit or built-in plug-ins into any Digital Audio Workstation (DAW) in a single instance, with both serial and parallel routing options.