MU.SE.S. (MUsical SEries Software) is software that allows to manipulate the musical series in alpha-numerical format through the use of the Csound code.
RTcmix is a real-time software "language" for doing digital sound synthesis and signal-processing. It is written in C/C++, and is distributed open-source, free of charge. In certain respects, it is similar in function to other extant unit-generator-based software languages such as CSOUND, SuperCollider and (to a lesser extent) JSyn and Max/MSP -- they do share a common heritage, after all.