Cleanbox for Gmail is a simple utility for aggregating and removing e-mail subscriptions, working on top of your Gmail account. It connects to your inbox, looks at every e-mail, and picks up subscriptions. The app lets you unsubscribe by finding the link in the e-mail. In addition, it lets you archive all related communication.
Mia for Gmail (was Notifier Pro for Gmail) is a desktop Gmail client which sits politely in your menu bar.
