This library allows for manipulating fonts directly and comes with command-line utilities for performing various operations on font files.

The libotf library provides the following facilities: - Read Open Type Layout Tables from OTF file. Currently these tables are supported; head, name, cmap, GDEF, GSUB, and GPOS. - Convert a Unicode character sequence to a glyph code sequence by using the above tables.

Ben's Own Graphics Library is a small framebuffer library, including basic widgets, support for text in multiple languages, and mouse handling.

Webfont converts sets of SVG files into an icon font, in any of the formats: woff2, woff, eot, ttf and svg. These can then be used in a browser. It has both a Node.js interface and a simple command-line interface (webfont).

Font Awesome is the Internet's icon library and toolkit, used by millions of designers, developers, and content creators.

This library contains functions for font embedding in PDF files, commonly used by CUPS filters.