FontForge - Free (libre) font editor for Windows, Mac OS X and GNU+Linux
Font Manager - Simple font management for GTK+ desktop environments
Glyphs - Make everything from dingbat webfonts to full-fledged text typefaces in the most Mac-like font...
Maintype - MainType is a professional font manager that allows you to view, manage, install and print your...
FontCreator - This professional font editor allows you to create and edit TrueType and OpenType fonts.
Typeface 2 - Typeface is a wonderful font manager for macOS that helps you pick the perfect type for your...