Apps similar to Apple Font Tool Suite include MkFont, which is free and open source. Other options are Fontself Maker, RoboFont, Microsoft Typography and AFDKO. In total there are eight Font Editors like Apple Font Tool Suite for Windows, Mac and Linux.
MkFont is a free (libre) tool to create & export fonts from existing assets. Component-based workflow, with advanced features to nit-pick & tweak metrics in a non-destructive way!.
Canada
Meet the fastest & easiest tool to create OpenType fonts, right within Illustrator & Photoshop CC. Fontself is used by thousands of creatives, including at Nike, Adobe, Google, Disney, Ubisoft or Sony.
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EU
RoboFont is a UFO based, mac only, font editor.
Written from scratch in Python with scalability in mind. The editor allows full scripting access to objects and interface. The application is a platform for drawing and modifying typefaces and much more.
Internal tools developed at Microsoft for manipulating and creating OpenType and TrueType font files. Used in development of new font toolsets and fonts. The tools includes TTFdump, TrueType Open Assembler, Flint, SBIT32, CacheTT, FastFont, and AddTable.
AFDKO is a collection of command-line tools used at Adobe for manipulating and creating OpenType font files. Can verify structures, and table entries and their checksums.
A tool that evaluates how closely a TrueType or OpenType font adheres to the current font format specification, as well as whether the font meets basic recommendations and deliverable guidelines from Microsoft.
United States
Easily locate and eliminate hard-to-find font problems that wreak havoc on computer performance and applications.
United States
