osd_mail watches a set of mbox style mail boxes for new mail and
displays on screen the names of those containing new mail. It requires xosd.
Pop3eye is a pop3 (also apop and mbox) email notifier dockapp. Pop3eye can notify you of email from specific people or with certain subjects. These are filtered using regular expressions. It will also display 7 partial lines of the email body in a tooltip window. It can monitor up to 5 accounts and display 1, 2 or 3 accounts at a time.
psi-imapmail is a small but nevertheless highly configurable gdesklet which fits perfectly into your psi-themed sidebar. It reports the status of your distant imap-mailbox (shows the amount of new messages/total messages) and is able to utilize both ssl-secured (port 993) and non-secured (port 143) connections.
QGMailNotifier is a portable GMail notifier designed to provide all of the functionality that the official Windows notifier has and more.
Sonicmail is a POP3 email notifier GNOME applet. It will notify you when you receive new emails by displaying a selectable icon in the applet. Also, optionally, a sound may be played. Sonicmail is fully configurable.
speaking mailbox is a modified xmailbox program which is able to speak From and Subject fields from the incoming mail.
speechbiff is a simple perl script that has functionality resembling the BSD biff program. Instead of displaying information about new mail in the terminal, speechbiff uses the /dev/speech device to read the information aloud with a text-to-speech package.
systraymail is a little application that sits in the system tray, and provides notification of new mail. It was written in C using GTK and libmailutils.
tkbiff is yet another program to alert you to incoming mail. tkbiff allows arbitrary commands to be executed upon mail reception.
WMBiff is a dock applet for WindowMaker which can monitor up to 5 mailboxes. It can read POP3, APOP, IMAP/IMAPS, mbox and maildir mailboxes as well as licq history files. It can also perform actions on the mailboxes upon mouse clicks or new mail arrival.
This is a DockApp, intended for use with WindowMaker or fluxbox -window managers. It has a graphical configuration interface using GTK+.
wmMultiPop3 is a WindowMaker dockapp which checks one or more pop3-accounts for new mail. It's based on wmPop3.
WMpop is a WindowMaker DockApp for monitoring a POP3 mailbox. It can be configured via a graphic interface written in GTK+. It displays: number of mails in the mailbox (or unread mails if checked in the preference screen), a scrolling text with the email address of the senders (only for local mailbox for the moment), and a status led, indicating mail checking progression and errors.
WMPop3 is a Window Maker dockable that inform sa user on how many messages are currently in their pop3 mail box.
xbiff 2 is a graphical mail notificator. Highly configurable, it gives choice between several appearances and several languages. It works with local mail or with a pop3 or imap4 server. It allows to configure the actions to run when receiving a new mail, and also for reading or writing mails.
XLassie is a replacement for the standard X mail notification tool, XBiff. It features counting the number of new messages you have, can query a POP3 server or an IMAP server, uses less memory than XBiff, can run a command when clicked on.
xmailheaders is a mail notification utility based on the mailbox utility that's available on Solaris workstations. The idea is that it sits on your desktop somewhere, periodically polling the mail server/spool for new messages. New message headers are displayed as they come in. Supported mailbox formats are POP3, IMAPv4, and Unix mail. SSL-based password authentication is also supported for POP and IMAP.