Switch applications in OS X just like you did in OS 9
These two apps offer OS 9-style app switching functionality, and there's not much different between them, except that ASM costs money and mutliXFinder is open source. One advantage ASM has is the ability to drill down and use each app's menu items, just like right-clicking on an icon in the OS X Dock. That's definitely useful, but leaving it out is an old-school touch that classic Mac OS aficionados can probably deal with.
[via Macworld Mac Gems]