Here are some additional resources that are related to or are known to work with with openGLCD.
openGLCD Font Creator: openGLCDFontCreator
Pixel/Bitmap fonts: 1001 Free Fonts
Pixel/Bitmap as well as Dingbat fonts: dafonts
ManiacBug Mighty1284p core: Mighty1284p GitHub Repo
ManiacBug Mighty1284p Blog: Mighty1284p Blog
Updated 1284core (recommended over ManiacBug): Mighty1284P RepoMighty 1284P Git Repository
Mighty1284P ForumMighty 1284P Arduino Forum Thread
m2tklib - Mini Interative Interface Toolkit Library: mtklib