SigMaker for Mac

From Pyrus N.A.:

SigMaker is a quick way to add signatures (or other scanned characters) to TrueType/OpenType fonts.
Step 1. First select a font in which to include your signature.
Step 2. Next open the saved image of your signature.
Step 3. Make any changes you would like to make on the enlarged image.
Step 4. Select the part of the image which includes your signature.
Step 5. Now adjust the dimensions of the image to fit the other characters in the font.
Step 6. Finally choose a key from the keyboard to represent your new character.
Step 7. Now save the adjusted font, and you're done!