ixiQuarks

"ixiQuarks is a software environment designed for live improvisation that allows for user interaction on hardware, GUI and code level. The environment enables innumerable setups with flexible loading of tools and instruments. The ixiQuarks consist of different types of tools: basic utilities, instruments, effects, filters, spectral effects and generators.

ixiQuarks exist in 3 different forms: ixiQuarks, ixiQuarks Pro and ixiQuarks as Quarks library for SuperCollider. (ixiQuarks are written in the SuperCollider programming language). For non-programmers, we recommend ixiQuarks, for people that like experimenting with programming and write their own instruments as part of ixiQuarks, we recommend ixiQuarks Pro. For SuperCollider users, we simply recommend installing the ixiQuarks from the repository.

Tools:
basic utilities: AudioIn, Recorder, Player, BufferPool, PoolManager, FreqScope, WaveScope, EQMeter, MixerNode, Amplifier, ChannelSplitter, TrigRecorder.

instruments: SoundScratcher, StratoSampler, Raindrops, Mushrooms, Predators, Gridder, BufferPlayer, GrainBox, PolyMachine, Quanoon, ScaleSynth

audio effects: Delay, Freeverb, AdCVerb, Distortion, ixiReverb, Chorus, Octave, Tremolo, Equalizer, CombVocoder, RandomPanner, MRRoque, MultiDelay, Cyberpunk, Moog

filters: Bandpass, Lowpass, Highpass, Resonant Lowpass, Resonant Highpass, Resonant, Klanks
spectral: SpectralEQ, MagClip, MagSmear, MagShift, MagFreeze, RectComb, BinScramble, BinShift

generators: Noise, Oscillators."

You can find more info here. You can find videos here.