Quarks (Libraries) for SuperCollider - all available at http://quarks.sourceforge.net/
AllGui - A configurable gui for an overview of different kinds of global variables.
Bending - A library for circuit bending and code bending (with J. Rohrhuber)
ContextSnake - Markov chain with dynamically variable context depth (with G. Nierhaus)
DayTimer - Do things by time of day.
GamePad - play with proxies and control loops with a gamepad (with H. Hoelzl)
GLOBOL - GLOBOL 2009, a little language with only globol variables on the server
JITLib Extensions - Some extensions to the common JITLib classes (with J. Rohrhuber)
JITMIDIKtl - Classes for using various MIDI controllers with JITlib
KeyPlayer - Attach functions flexibly to keys. (with H. Hoelzl)
ListeningClocks - A library of interacting clocks, developed for the Virtual Gamelan Graz. (with R Schuetz, J Rohrhuber)
Manta - using the Snyderphonics Manta controller with SC3
MathLib - Some mathematical extensions to SuperCollider (with many others)
Morse - Morse Code according to ITU.
Republic - Simplify synchronisation of networks and make it easy to join and quit a running session. (with J. Rohrhuber)
SpeakersCorner - Classes for multi-speaker setups: Latency, EQ, MasterFX, etc.
Wavesets - Analysis and synthesis with soundfile fragments as proposed by T. Wishart.
Standalone Applications:
Fragglomerator - Four channel generative composition based on "Angeschlagene Moderne" (Dombois). Available for performances on request.
Bleepo (with H. Hoelzl) - A synthesis model of the BlippooBox synthesizer circuit by Rob Hordijk, written in SC3, with some extensions/deviations from the model.

For / with other artists (not publicly available):
Asynchronous Jitter - Florian Hecker, installation
Auditory Objects - Florian Hecker, installation
EventStreamObject - Florian Hecker, installation
Chisenhale / Ikon (2010) - Florian Hecker, installation
Live Setup (2009) - Florian Hecker
Nerves (2011) - Zbigniew Karkowski, neural synthesis and live electronics for cello.
PulsarGenerator (2000/2001) — http://www.create.ucsb.edu/PulsarGenerator/
Interactive software synth for Pulsar Synthesis, written with Curtis Roads.
Described in detail in Curtis Roads, Microsound (2002), MIT Press.
CreatoVox (2000/2001)
A virtuoso performance instrument for multichannel granular synthesis, supporting multiple controllers. Described in detail in Curtis Roads, Microsound (2002), MIT Press.