Manage all your Gmail, Calendar and Contacts accounts in Mailplane instead of cluttering up your browser window. All-in-one app with Apple-like keyboard shortcuts. No separate set-up required. This application-like experience for using Gmail in a browser includes the ability to drag and drop files into attachments, easily send images, and use Gmail as the outbound mailer when clicking on mailto links.
Pricing: Free 15 Day Trial and then a flat $29.95 license fee.