Nomad PIM
As of December 12th, 2009, the development of Nomad PIM has been discontinued

Nomad PIM is a free extensible personal information manager.

It provides a platform for integrating personal data, and allows customization to personal needs. Nomad PIM contains modules for personal notes, journal, address book, personal finances, task management, time tracking and evaluating basic fitness measurements.

Nomad PIM is implemented as an Eclipse RCP application, and is based on a modular and extensible architecture that allows 3rd party plug-ins to extend it. It is open-source and available under the terms of the Common Public License.