Hey, gang!
I've been using OS9 a lot on my iMac G4, and there are a few interface enhancements that I swear I used to have on my old computers. One was a way to have multiple desktops, similar to the current 'Spaces' features of OSX. Also, I've been using Path Finder on my macs for years now, and I feel like there was an older utility that added tabbed windows and a 'favorites' tab to the OS9 Finder. I might be wrong about that one, though.