Calcurse is a text-based calendar and scheduling application. It helps keep track of events, appointments, and everyday tasks. A configurable notification system reminds the user of upcoming deadlines, and the curses based interface can be customized to suit user needs. All of the commands are documented within an online help system.
Cerb is a fast and flexible Web-based platform for business collaboration and automation. It helps you remember anything about anyone, collaborate from anywhere, deftly reply to a flood of email, automate, stay informed, capture feedback, track time, flag opportunities, manage tasks, share expert knowledge, and otherwise execute efficiently.
ChaNT is a flexible, powerful, cross-browser, and easy-to-use Web-based chat system. It supports BBCode, 3D animated smilies, and an IM-like toolbar for formatting your chat messages. It does not require any browser plugins like Java or Flash. It does not require MySQL. ChaNT includes privacy features such as traffic encryption and client side password hashing. It has a powerful admin control panel and can integrate with many forums and CMS.