XNotesNG is the next generation of XNotesPlus, a full-featured personal information manager. It is plugin driven and includes a Todo Manager, Calendar Manager, Category Manager, and extensive notes system, including features such as text searching, printing, alarms, date and calendar inserts, and categorization by colored projects.
Haystack is a powerful tool designed to enable each and every individual manage all of her information in the way that makes the most sense. By removing the arbitrary barriers created by applications that only handle certain information "types", and recording only a fixed set of relationships defined by the developer, users can define whichever arrangements of, connections between, and views of information they find most effective. Such personalization of information management will dramatically improve your ability to find what you need when you need it.
Simple Timetracker is an application useful for keeping a record of time spent on projects and activities therein. You use mouse-drag gestures to 'paint' time spent on a task on a continuous timeline. It takes care to make sure any particular stretch of time is attributed to at most one task. It records data, via JDBC, in a database. By default, it uses HSQLDB, but (for example) a PostgreSQL database on a central server may be used.
Agilefant is a backlog management system that can be used when spreadsheets and most of the current issue tracking and project management systems meet their limits. It is intended to be used with agile methodologies that emphasize building releasable software in short, fixed time periods, where features are commonly managed using "backlogs".
Taru is appointment scheduler that was designed for use within a university for scheduling demo times between course assistants and students. It includes support for calendar synchronization with iCal and Google. Taru means "to be sufficient, to be enough" in Japanese and "myth" in Finnish.