There is some unsorted stuff in the download directory as well, the persistence engine, some flow system experiments, and old ksynth/aRts releases.

I am actively developing on aRts - a modular analog realtime synthesizer running under linux. It features KDE gui, midi synthesis,... You may still know it as KSynth - the project has been renamed between versions 0.2.5 and 0.2.6 ;)

Infos about aRts are at www.arts-project.org.

There is also some documentation about aRts/MCOP (the next generation of aRts - but still in the "unstable & not complete" development phase) here.