WMMail.app is a "mail-checker" like xbiff.  It indicates the status of the
user's mailbox by showing animated XPM icons when incoming mails are
detected.  Additionally, it can be configured to execute a program on
incoming mail and/or on mouse double-clicks, and can provide a count of
emails in the user's mailbox.  It currently supports UNIX mbox files, MH
and MailDir mail folders, and IMAP4 remote mailboxes.

WMMail.app is based on asmail, a similar applet designed to work with the
Wharf of the AfterStep window manager.  However, WMMail.app has been
re-written to be compatible with the Window Maker Dock, i.e. WMMail.app
can be dragged and dropped on to (and off from) the Dock dynamically. 

The latest and greatest version can be found at
http://www.eecg.utoronto.ca/~chanb/wmmail.html

- Jim <jim@phrantic.phear.net>