If you have ever been interested in making your own fonts for fun or profit, BirdFont is an easy to use free font editor that lets you create vector graphics and export TTF, EOT & SVG fonts.
To install Birdfont, simply use the PPA below to insure you always have the most updated version. Open the terminal and run the following commands:
sudo add-apt-repository ppa:ubuntuhandbook1/birdfont
sudo apt-get update
sudo apt-get install birdfont
If you dont like using a PPA repository, you can download the appropriate DEB package for your particular system....
If you need help developing a font, there is also an official tutorial here!