eM Client is a fully-featured e-mail client with a modern and easy-to-use interface. eM Client also offers calendar, tasks, contacts, and chat. The application supports PGP, so you can create and import your PGP keys to send encrypted and signed e-mails. eM Client has the ability to back up while running. In addition, it can download and display avatars for your contacts from the web.
Mia for Gmail (was Notifier Pro for Gmail) is a desktop Gmail client which sits politely in your menu bar.
