Celeste is a mail reading and organizing program. The name "Celeste" is a reference to an earlier mail reader named "Babar", which was written at Xerox PARC by Steve Putz and John Maloney.
Celeste is included in the standard Squeak image, and can be opened by choosing "open" "email reader" from the world menu. To download a sample group of messages, use the green-button menu on the top left list pane, select "fetch mail", and answer the questions that are asked. No messages will be deleted from your server–the messages will simply be downloaded so that you may play with Celeste using real messages.
Celeste Overview
Here is the main Celeste Window. (Your email will of course be different):
Note the main features of this window:
A button bar at the top, with common actions
a top left pane with categories (some automatically created)
a top right pane with a list of messages in the selected category
a larger bottom pane with the contents of the message selected in the top right pane.