FontMap is described as 'may be used to view and print both installed and external fonts; it can display a table, individual characters, a keyboard view, font description, or whatever text you wish to enter' and is an app in the Development category. There are more than 25 alternatives to FontMap for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and iPhone. The best alternative is NexusFont, which is free. Other great apps like FontMap are BabelMap (Free), Character Map (Free), WinCompose (Free, Open Source) and AMP Font Viewer (Free).
X-Fonter is an advanced font viewer and font manager for Windows that supports all font types (Truetype, Opentype, Postscript, Raster and Vector). The clear font previews make selecting the right font an easy task.
Font Book is the standard font manager that comes with Mac OS. The program enables users to: Preview and install font files, avoiding multiple instances of the same font. Review installed fonts using various sample texts and sizes.