gbdfed is a GTK+-based BDF font editor. Multiple
fonts can be loaded from the command line.
Multiple fonts can be open at the same time.
Cutting and pasting glyphs between fonts, font
name and property editing, and built-in online
help. It imports PK/GF, HBF, PSF, CP, Linux FNT,
VFONT, OpenType/TrueType, and some FON/FNT fonts.
It can export PSF2 fonts.