birdJam is a software program that organizes Stokes bird songs into a user-friendly system for iPods. I found that with a little manipulation I could load the software on my Zune player. The main purpose for this software is to help you learn bird song on the go. It can also be used to identify the bird sounds you hear in the field. One of the main uses of this tool, although no one wants to publicly admit it as the ethics of such are still being debated, is to call the birds using their own calls in for easy viewing. Rather than continue that debate here, please adhere to the birdJam Ethics.
The software works great! It is so easy to use on the iPod and the loading was not even that difficult for a somewhat tech-savvy guy like myself.
Price: Ranges greatly depending on the iPod you want to purchase. You can buy the software as well as the bird song CD's a la carte to customize it to your wants and needs.