As its name clearly explains, it is a font viewer. Its a simple application which offers us a service really useful and totally free.
FastFonfPreview is capable of showing all fonts in your computer on screen, with different formats and sizes, so you can choose the correct one for your new projects.
It shows any True Type or Open Type font, no matter if they are installed i your HD or in other drive (CD. DVD, USB...). In addition it also acts as a font installer.