nixx

At work, we use TeamTrack - I wouldn't recommend it, it has a pretty horrible interface.

Previously I used FogBugz, which was a joy to use, how I miss it now!

There's nothing wrong with floating-point math in the kernel (unless your CPU has no FPU!)

Arguably the best-performing audio driver API of the moment is CoreAudio (on Mac OS X) - and that uses floating point code in the kernel... ;-)