This is a paid asset, but now you can download Sprite Font Builder Free.
Detail this asset from Unity Store: Original Link
Sprite Font Builder v1.2.0
UNITY 5 AND UI READY!
MOBILE AND VIDEOGAME CONSOLES READY!
Think in a world where the games has boring texts with flat TTF fonts like a Word document.
The sad part of this is history is, this is our world!
BUT! With the Sprite Font Builder and your favorite bitmap software (PhotoShop, Paint, GIMP…) you will can create your very own and AWESOME font for your game with just a few clicks!
Make your texts awesome NOW with Sprite Font Builder!!
Visit our topic for questions http://forum.unity3d.com/threads/sprite-font-builder.326705/
Space Lander – Vortex Game Studios (www.spacelander.com.br)
COUTURE – http://openfontlibrary.org/en/font/couture (MIT (X11) License)
TOWER_PRINT – http://openfontlibrary.org/en/font/tower-print (MIT (X11) License)
SOFIA – http://openfontlibrary.org/en/font/sofia (MIT (X11) License)
Attention, you can’t use this plugin with the legacy UI engine.