Portable, free ear training software. Runs on GNU/Linux, FreeBSD, MS Windows and with some luck MacOSX.

GNU Solfege has a web page, wiki and download links at http://www.solfege.org, and we use Google Code as our bug tracker. I have set up some domain redirection, so that http://bugs.solfege.org will redirect here, and http://bugs.solfege.org/bug-number will redirect to the bug.