There are other note taking apps out there, but I have always found they are just "yet another thing" to do, instead of making my life easier. My desktop is maybe chaotic, but it works. CintaNotes, however, feels natural and sits in the system tray ready to spring into action whenever you need it: highlight text, hot key, you're done. Easy.
For me, though, the excellent interface and features of CintaNotes work better than any of the other apps. It is snappy, beautiful and the functionality is just right. It also handles the tag based approach for managing notes perfectly well.