Mailplane 2.5

If you are in need of an easy-to-use application that will allow you to easily manage your Gmail accounts, then you will appreciate Mailplane.
Mailplane is a specialized Gmail account manager tool.Using this convenient piece of software will improve the handling of your Gmail account and add extra functionality. You will be able to use multiple accounts simultaneously and easily switch between them. The program will also allow you to add formatted signatures and image logos to your emails. You can also take a screenshot and automatically add it to the email.

Moreover, you will be able to use the basic email functions directly from the programs interface, like: create new email, reply, forward, delete and edit address book. The application is also highly customizable allowing you to adjust the general, accounts, photos and tweak AI settings to your specific requirements. You will also be able to add supplementary tools to the application from the "Advanced" tab in the preferences menu.

To sum it all up, if you want a compact, user-friendly and feature-rich Gmail account manager tool, then Mailplane might work for you.