EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.

Tuio.org - Tuio is a billing and payment application that allow daycare centers and pre-schools to centralize and manage all parent billing and payment in one place.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

Sawyer - Discover a wonder-filled world of kids classes, camps, events, and activities, right in your neighborhood

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.

Yusp - Yusp is a next generation, real-time personalization engine having all product modules as defined by Gartner for various business models.