Fontmatrix is a graphical font manager. Targeted audience are mostly
adventurous graphic designers and typesetters who deal with hundreds
and even more fonts during their work - browsing the endless lists
of font dialogs. Basically, the Fontmatrix helps doing three things:
activation and deactivation of fonts, tagging fonts and fontbook
generation.

WWW: https://github.com/fcoiffie/fontmatrix