dp4 Font Viewer
A portable font manager handles Unicode with some nice filtering options
Pros & Cons:
One emerging option I'm going to watch is Stephan Scholz's dp4 Font Viewer.
It's biggest shortcoming is that you can only view one folder at a time and you cannot group fonts. You could use folders to group your fonts except that you can only install or delete font files as there is no copy, move or rename.
On the positive side it is portable, has a 64-bit version for Windows 7, is simple to use, handles Unicode, temporarily installs fonts, and has some nice filtering options such as by line weight (so I could select fonts to save on printer toner/ink).
dp4 Font Viewer was reviewed by Gizmos Freeware on