I just noticed the initial announcement disappeared!
funkGen is a simple command line function generator which can (of course) generate functions, but also is able to add, subtract, multiply and divide functions, and apply correlation and convolution, and FFT. The results can be listed, plotted, and converted to audio files in many formats.
Version 0.5 was the first public release, lacking import options,
which have now been added to version 0.6.
Also, a Spanish translation of the manual has been added.