Qtopia (former Qt Palmtop Environment) is a platform for linux-based PDAs, Webpads and mobile-phones developed by Trolltech. License As most Trolltech products Qtopia is dual licensed under the free License:GPL or closed-source which requires a licensing fee then.

Qtopia Greenphone is a Linux mobile development device open for software innovation. Weblinks Greenphone Wiki

Qtopia Phone Edition is a comprehensive application platform and user interface for Linux-based mobile phones. See Also greenphone

Gammu (formerly known as MyGnokii2) is a cellular manager for various mobile phones/modems.