iPodBackup is fully compatible with 10.3 (Panther) or later and that is more than enough reason to share this great Free application. The name says it all! This fantastic app backs up your iPod and allows you to customize a list of items to be excluded by dragging and dropping. If you still have your iPod playing your favorite tunes, let’s back up.
* iPodBackup 1.5.4 (Free) PowerPC – 10.3 / 10.4 / 10.5 (Panther / Tiger / Leopard). http://cl.ly/3o0I2N011332
MAC POWERPC 
Nice. I found this one, also Universal Binary, so PPC-compatible: http://www.headlightsoft.com/detune/