PocoMail 

A powerful email program that does not compromise your privacy or security. The streamlined interface never gets in your way, with many unique features that allow you to take full control of your mailbox, like full-page preview and Bayesian filters.
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Barca 

Barca is a seamless integration of a powerful email program, personal information manager and planner. Aimed at the professional and small business market, Barca provides a single interface to manage all your information in a safe environment.
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