message like

Embed hidden messages inside regular emails (designed for kids).

A Twitter client with message store capability

Export new Mail.app message to iCal calendars.

Export Mail.app message to iCal ToDo list.

MacEtegami is mean a post card painted a picture and drawn message in Japanese.

Set email message priorities in Mail.app.

Chrome-like keyword search for Safari.

Quoting headers like Outlook and signatures in Mail.app.

Treat Zip files like folders.

SIP softphone with PBX-like features.