FreeType

FreeType is a freely available software library to render fonts.

It is written in C, designed to be small, efficient, highly customizable, and portable while capable of producing high-quality output (glyph images) of most vector and bitmap font formats.

Some products that use FreeType for rendering fonts on screen or on paper, either exclusively or partially:

• GNU/Linux and other free Unix operating system derivates like FreeBSD or NetBSD;
• iOS, Apple's mobile operating system for iPhones and iPads;
• Android, Google's operating system for smartphones and tablet computers;
• ChromeOS, Google's operating system for laptop computers;
• ReactOS, a free open source operating system based on the best design principles found in the Windows NT architecture;
• Ghostscript, a PostScript interpreter used in many printers.

Counting the above products only, you get more than a *billion* devices that contain FreeType.