The makefile for this collection is configured for Linux only -
Linux binaries included. Each external has a demonstration
Pd patch (*.pd) associated with it.

Source contents:

polygate~~ switch between multiple signal inputs
variable fade rate both linear & equal power
shuffle a no-repeat random generator
outputs numbers within a set range
pan~~ equal power stereo panning
system sends a system message to the console
ln~~ natural log + inverse
rec2pol~~ convert rectangular coordinates to polar eg. can be used to convert sine & cosine rfft~~ output to phase & magnitude
pol2rec~~ inverse of rec2pol
getenv Sends value of an environment variable argument on bang.
use a 'set <NAME>' message to reset the variable name.
 

two other related patches:

polvoc.pd: example of pol2rec? etc
noisegate~~.pd: simple noisegate used in abov
e.