The designers of Althea felt that there wasn't a stable, easy to
use, GUI, IMAP (Internet Message Access Protocol) e-mail client
for X/GTK+. The design goal was a stable  e-mail client with the
richness of usability of Microsoft's Outlook, Qualcomm's Eudora,
and Cyrusoft's Mulberry.

WWW: http://althea.sourceforge.net/