jMax is a visual programming environment for building interactive real-time musical and multimedia applications by allowing the user to interactively design dataflow circuits. The basic data types that can go through are integers, symbols, lists, etc. It is an event-driven system and has been used for MIDI processing. A second part of the system (DSP) allows a continuous signal to flow through a circuit, which is most useful for PCM sound (ie. microphone, sound files, etc.). The system is extensible by using shared libraries, you may add data processor types, data types, GUI elements, device types, and more. Data processors may also be designed as circuits and reused.
Cumulus is a software synthesizer which implements the Asynchronous Grain Synthesis. This synthesis allows you to create very original sounds to be used in your music (mainly percussive and ambient background sounds). It features a convenient QT-based GUI where each paramter can be controlled by an envelope, the ability for all parameters to be controlled with hardware controllers (MIDI-controllerbox), an interface to use a MIDI-keyboard (polyphony adjustable, default 8 voices), internal 32-bit accuracy, an internal sampling rate that can be any multiple of the external one, and full realtime capability with parameter changes audible within around 50ms, depending on system latency.
MidiMountain is a sequencer to edit standard MIDI files. Its easy-to-use interface should help beginners to edit and create MIDI songs (sequences), and it is designed to edit every definition known to standard MIDI files and the MIDI transfer protocol, from easy piano roll editing to changing binary system exclusive messages.
jMusic provides a library of classes for generating and manipulating music, and is a solid framework for computer assisted composition in Java. jMusic supports composers by providing a music data structure based upon note/sound events, and methods for working with that musical data. jMusic can read and write MIDI files, audio files, and its own .jm files. jMusic is designed to be extendible, encouraging you to build upon the functionality of jMusic by programming in Java to create your own music composition tools.