There are lots of benefits with FontRainbow. Here are five...
1 No need to ‘add’ fonts
  Other font managers make you ‘add’ fonts to the program in order for the program to manage them. To add them, you need to navigate to the folders where the font files are, which means you need to know where they all are on your hard drive. FontRainbow does this job for you - all font files on a drive are ‘added’ automatically.
2 No need to preview
  Other font managers show a list of face names in one window, which you need to click on to see sample text in a separate ‘preview’ window. With FontRainbow, sample text is visible all the time, for all fonts, with no clicking.
3 Attributes, not sets
  The method of organizing a font collection is completely different from other programs. Up to now, this has been done by providing a system of folders, or ‘sets’, into which fonts are grouped. FontRainbow doesn't use sets, it uses a filterable list. So, rather than viewing fonts one group at a time, you can filter the list using one or more attributes in any combination you like. This gives you a much more flexible and powerful way to narrow down a potentially very large list to a handful of fonts that match the characteristics you specify.
4 We make your fonts easier to explore
  FontRainbow categorizes your fonts by font family (Serif, Script, etc). We also measure each font and categorize for weight and width as well.
5 We respect your system!
  Some font managers, when adding to a structure of sets, move or copy font files on your drive. We don't do this. FontRainbow maintains pointers to your font files, but the files themselves are unaffected and stay where they are.
FontRainbow is currently Windows only. An Apple Mac version is planned for hopefully some time in 2009.
FontRainbow currently handles only Windows (TrueType) fonts. Support for Adobe Type 1 fonts is planned for later versions.
FontRainbow for Windows (1.8Mb download) is £30 Sterling, payable by credit/debit card (card details are protected).
What early users have said about FontRainbow...
"it is just a simple, wonderful piece of programming"
"I've spent a bit more time combining 2 font sources on one computer and looking for duplicates - I wouldn't have considered the task without FontRainbow."
"your program makes it so easy that you can be looking at one particular font and see one in the list that you think needs re-classifying and just do it."
"I have been playing with it, up till 5am last night LOL!!"