open source Email Clients

Columba - A java based email client featuring a user friendly graphical interface.

Daffodil Organizer - Highly flexible way to organize emails; includes import facility from Microsoft Outlook.

Evolution - More popularly billed as the Outlook of Linux, its calendar, address book and other features make it a good option as an email client.

ICEMail - Open source java client with support for the latest email standards.

Mahogany - Cross platform email client supporting UNIX and Win32 platforms.

Mutt - A small and powerful text based email client for UNIX operating systems.

Penelope - The open source version of Eudora currently under beta and planned for full release by this year.

Phoenix Mail - One of the older open source email clients developed using Borland Delphi.

Sylpheed-Claws - An open source email client with an interface similar to Outlook Express; works as an RSS feed reader too.

Thunderbird - A secure email client with several customization options to fit the user's needs.

Zimbra - Zimbra is currently one of the biggest names in open source, and is the future collaborating and messaging software. Now owned by Yahoo.