From Mono Systems:
Revolver Mail includes 3 important basics for personal organization: Email, addresses and organizer, all for free! Revolver Mail is a safe and network-compatible alternative to the existing email programs. It includes: Email, addresses, calendar, tasks, notes and projects. Many special functions are designed for the use in small companies or by self-employed people. Thanks to its safety concept and its virus resistant email area Revolver Mail is not only interesting for safety critical company data but also for private people. Further specific features are: high safety due to encrypt database, overview and simple handling due to the one window concept and an easy client server with automatic server recognition.