From Just Solve the File Format Problem
MonkeyLogo is a Palm OS program for creating, installing, and sharing "operator logo" images on Nokia phones. It was developed by a company named Primate Systems. It apparently has a graphics format associated with it.
- MonkeyLogo demo software, from archive.org and Tucows
- XnView claims to support MonkeyLogo images, but it's not clear what form it wants them to be in.