FontBase is a lightning fast, beautiful and free font manager for designers. FontBase gives you all the stability, speed and reliability of a paid font manager, but free and on all platforms!
FontBase 2.0 is a decent free Font Manager if you want a reasonably good looking app with some extra Coming soon™ functionality on its way, but I would say that Apple's own Font Book is way better. It's more functional than FontBase, but hasn't got the flashy modern looks that the other apps have.
Emily Ferguson- Jack of some trades
Font Base is a good free font manager with a lot of potential, and might be worth revisiting in the future when more features are added.