Mail.Appetizer

If you’re a Mac user and a fan of Mac’s native Mail.app program, you should check out the mail.appetizer plugin. The moment a new message is received, Mail.appetizer displays a pretty little transparent window with a brief summary of the message, and you can determine whether the message requires your immediate attention. Reading mail without switching to Mail helps me workflow tremendously, as I am a notorious check-my-email-every minute kind of guy.