phlyMail is a groupware, webmailer, and PIM. It offers unlimited nested groups, unlimited POP3/IMAP profiles, quotas, an integrated address book, a calendar with multiple reminders and event repetitions, a file manager with an integrated WebDAV server, the ability to send faxes, SMS support (which lets you send SMS, get reminded of events via SMS, and get email notification via SMS), a bookmark manager, themes, and multilingual support. It uses either sendmail or SMTP to send email, and can handle MIME and SSL connections. Support for IDN (Internationalized Domain Names) is included. Through its modular design, it's easy to add completely new features as modules, which can be plugged into the system.
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.
Moyobase is a Web application designed to manage all your data and information in one place. Its powerful customizable features allow you to structure data and quickly access important information. Colleagues and partners can add notes on a customer page so that the information is instantly shared among everyone involved. Moyobase keeps track of things to do and manages your tasks with due dates, priorities, and notes. You can also assign tasks to others. Moyobase can plot charts with any piece of information stored in your database.