Just checked for you...
The one I use doesn't support mac, but I found a couple that do:
Fontlab Typographic Tools - font editors and converters - FontLab Studio Fontlab Typographic Tools - font editors and converters - TypeTool 3<small> NEW!</small>
There's this one too, but it looks simpler:
SourceForge.net: Files
As for not having Word (good on you!), once your font is installed into your system, any application that lets you pick a font will be able to use and display it. In windows, the simple program that comes with XP -- called "Notepad" -- can display my fonts, so you'll have no problems.
Just remember to store a backup copy somewhere of your created fonts, else if your operating system needs to be re-installed, you'll lose it, and any document that uses your font will display incorrectly.
Hope that's of some use!