If you're using Linux, I'm currently working on a utility
to work with ALSA (which CSound on Linux supports). It
is a combination of a midi router (allowing you to send
the output of one app to any other), a configurable
launcher (add your apps to the icon bay and launch them
by dropping the icon onto the routing canvas), a series
of filters/remappers/transposers (as a plugin interface,
and a utility for recording and saving state.

I'm currently in the alpha stages, (I have functional
parts but am still working on the GUI portions), but
if you're interested I can get you early betas.