I've did a port of the JSFX specification (the DSP effect language that comes with Reaper) and made it into pure-data.
JSFX is a cool little DSP language that works per sample (like gen~ on Max) and there is a ton of FX that you can use in pure-data. The only problem right now is that it is quite CPU bound, but I'm working on enabling the JIT... Feedback is welcome.
I've just added the OS X build