There is another open source software which generates binaural beats. The software is Paulstretch, an extreme-audio time stretching software I wrote few years ago: http://hypermammut.sourceforge.net/paulstretch/

Here is a screenshots of binaural-beats generator: http://hypermammut.sourceforge.net/paulstretch/screenshot3.p...

But I don't know if there are real psychological effects of the binaural beats :)