mididings is a MIDI router and processor for ALSA and JACK MIDI. It supports filtering and modifying MIDI events in many different ways, and allows for seamless switching between different patches even while playing. mididings is scriptable and extensible in Python, while the core MIDI processing code is written in C++ in order to allow low latencies and realtime usage.
Schnolgo is a musical composition system. It has a number of unique features, including a way of handling polyrhythmic timing which provides a flexibility one cannot easily achieve with traditional sequencing programs or sound programming environments. Currently, Schnolgo is in the form of a Python package, and its main output format for compositions written in it is MIDI.