Linux, UNIX
Balsa is a lightweight e-mail client for GNOME. (GPL)
Linux, UNIX
Claws Mail is an email client (and news reader), based on GTK+. (GPL)
MAC OS X
Correo blends technology from two popular Mozilla projects, Camino and Thunderbird, to create a polished native mail client for Mac OS X. (GPL)
Linux, UNIX
KMail is the email component of Kontact, the integrated personal information manager of KDE. (GPL)
Linux, UNIX, Windows, MAC OS X
Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA). (GPL)
Linux, UNIX, Windows, MAC OS X
Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. (MPL)
Popularity: 1% [?]
