GNU FreeFont (also known as Free UCS Outline Fonts) is a family of free OpenType, TrueType and WOFF vector fonts, implementing as much of the Universal Character Set (UCS) as possible, aside from the very large CJK Asian character set.

The project was initiated in 2002 by Primož Peterlin and is now maintained by Steve White.

[5] The core Latin characters are derived from the Type 1 fonts donated by URW++ to the Ghostscript project.

[6] Specifically, the design notes of GNU FreeFont state that:[7] The Greek, Cyrillic, Armenian, Hebrew, Arabic, and International Phonetic Alphabet (IPA) characters are partially based on Omega, which is an extension of TeX.

Valek Filippov further added some composite Latin Extended-A glyphs.