FontForge 
FontForge is a free (libre) font editor for Windows, Mac OS X and GNU+Linux. Use it to create, edit and convert fonts in OpenType, TrueType, UFO, CID-keyed, Multiple Master, and many other formats.
fontforge.org — homepage
designwithfontforge.com — font creation manual
Getting help
The bug tracker is for reporting bugs, not for asking questions. Please direct questions to one of the following:
- Mailing list
- Live chat — #fontforge on Libera
Installation & contributing
INSTALL.md — developer instructions to build from source
setup_linux_deps.sh — a list of installation dependencies
CONTRIBUTING.md — contributing guidelines