Mac must haves:
- Quicksilver
- Omni Graffle
- Omni Outliner
- Growl
Check out
http://www.versiontracker.com to search/find good Mac apps.
I wonder sometimes if you PC guys know what you're missing. From fully usable drag-n-drop, to simple and unobtrusive work flow (no needless dialogs, etc), no reboots for reconfigurations, intuitive interfaces, and powerful features, the differences could not be more stark. The filesystem is cleaner, no mystery file extensions floating around all over the place, the apps are compact and rarely require installing and rarely if ever require uninstalling. And on and on.... It is truely the finest and most powerful operating system on the planet.