In addition to Fedora's own Fonts special interest group:
- the freedesktop.org text layout working group regularly publishes materials on present and future state of text rendering on FLOSS desktops. They're all a must-read.
- Ed Trager maintains the very complete unifont web site.
- the Open Font Library is an effort to host open fonts, though all may not be free enough for Fedora.
- the Greek Font Society has proved a very dynamic publisher of high-quality modern fonts. Its objectives are described in this TUG article.