Developer website: FontLab Ltd.
Photofonts are files with the extension .phf. With our free Photofont Start plugin, they can be used in the most popular bitmap-editing applications: Adobe Photoshop, Corel Painter, Macromedia Fireworks and applications that accept Photoshop plugins.
The Photofont file format specification is publicly available. It is based on open standards like XML and PNG. You can create and edit Photofonts using our professional bitmap font editor BitFonter for Mac OS X.
*Previously available here