PhoneGap is an open source development framework for building cross-platform mobile apps. Build apps in HTML and JavaScript and still take advantage of core features in iPhone/iTouch, iPad, Google Android, Palm, Symbian and Blackberry SDKs.
OggPlay is an audio player for smartphones. OggPlay was initially written for SonyEriccson P800 and then released under the GPL by Leif H. Wilden. In a true open source project, OggPlay has now been ported to many other Symbian phones. The OggPlay project is hosted on Sourceforge. Please help to keep it going by donating to the project (click on the Donate button).