FontForge - Free (libre) font editor for Windows, Mac OS X and GNU+Linux
Cheap Font Generator - Need to generate your own font? Our font creators make your handwriting as your font.
BirdFont - Birdfont is a free font editor which lets you create vector graphics and export TTF, OTF, EOT and...
Scanahand - Scanahand makes it easy to create Windows Truetype fonts from your handwriting.
Glyphs - Make everything from dingbat webfonts to full-fledged text typefaces in the most Mac-like font...
Microsoft Font Maker - Use your pen to create a custom font based on the nuances of your own handwriting.