FontForge - Free (libre) font editor for Windows, Mac OS X and GNU+Linux
Future Me - Send an email to your future self
Glyphs - Make everything from dingbat webfonts to full-fledged text typefaces in the most Mac-like font...
Dabble Me - Your own private place to write. A journal/diary to help you remember what's happened in your life.
BirdFont - Birdfont is a free font editor which lets you create vector graphics and export TTF, OTF, EOT and...
Letter to Yourself - Send a physical letter to your future self