GIMP Basics: Text Tool In-Depth Tutorial
Are there any good realistic looking signature fonts you guys know of?
A quick Google search for 'signature fonts' turns up quite a few results.
Some that looked good:
There's a bunch of good ones here.
One of my favorite handwriting fonts is League Script #1 - which is also conveniently open source.
It's a very flowing font, so it might not be suitable for masculine styles.