Stamper

That is SUPER useful for all businesses signing countless legal docs all the time! Mac Preview is too limited in most cases and the signatures look fake, this is a nice refresher and you can have a REAL signature on your digital docs. Fully recommend!

I just used this to sign a PDF. The process is pretty straight forward. Step 1: Use your phone to take a photograph of your signature. At that point you get a code. Step 2: Use the desktop app to load up a PDF you need signed. Use the code from the mobile app to load up the signature on the desktop. This sure beats paying Adobe a monthly sub. If you need more heavy use, you can unlock the paid version.