Software-Karte

Lichen is a Web-based IMAP client that puts an
AJAX veneer on your email. It's written in PHP,
with a JavaScript interface that is usable in most
modern browsers, and is designed to be painless to
install.

Correo is a mail client that blends technology
from two popular Mozilla projects, Camino and
Thunderbird, to create a polished native Macintosh
application.

Clawsker is a Perl-GTK2 applet to edit hidden
preferences for Claws Mail, and to do it in a safe
and user friendly way, preventing users from raw
editing of configuration files.

Pygmy is a GNOME mail client written in Python. Features include folder
hierarchies, multipart/MIME messages, message filters, a simple address book,
and support for privacy through GnuPG.