FontForge - Free (libre) font editor for Windows, Mac OS X and GNU+Linux
Fontself Maker for Photoshop - Turn any lettering into color & vector fonts
Glyphs - Make everything from dingbat webfonts to full-fledged text typefaces in the most Mac-like font...
Type Anything - Test & create the perfect typography setup for your website
FontCreator - This professional font editor allows you to create and edit TrueType and OpenType fonts.
My Script Font - Make a font with your own handwriting