Cfont Pro is here to help. With support for all major font file types (including Postscript and TrueType), the free Cfont Pro will let you preview fonts from disk before you install them.
The application will also create proof sheets of multiple fonts and export them to HTML or RTF files so you can print them for reference or forward them to someone for a preview.
You can also search your system for fonts, view font attributes and see single characters full-screen to check for imperfections. You know, if you're that much of a junkie. Ahem. [via; via]