I’m very happy with ‘Ear Training Method’ from Jazzadvice.com. The format makes it easy to use. I’ve loaded it up on an iPod, then I put my selection on repeat, and go about my day! I’ve tried several other ear training programs, which are all good, but this one is the most accessible. I also like the concept of “ingraining.” It makes sense to me as a learning tool for this important aspect of jazz performance.