For those unaware of "pure data and other software", these are programming languages and/or coding environments for the synthesis of music:

Pure data: http://puredata.info/

Csound: https://csound.github.io/

Supercollider: http://supercollider.github.io/

Chuck: http://chuck.cs.princeton.edu/

Overtone (Clojure using the Supercollider synthesis server): https://overtone.github.io/