Shift

Shift eliminates all that switching between Gmail accounts. Shift into a higher gear with the email client that makes navigating between Mail, Calendar, and Drive accounts fast, easy, and beautiful.

Features

• Easy access, unlimited accounts. You spend a lot of your day checking email, Calendar, and Drive accounts. Stop wasting time navigating between them (and wondering what you're missing!) and get more work done.
• De-Clutter your Desktop. It’s like keeping your room clean. Shift is a handsome solution to your multiple browser, tab, incognito, and logging-in-logging-out nightmare. Access Gmail, Calendar and Drive, for all of your accounts, without the mess.
• Stay Up-to-Date. With native desktop notifications, you can see exactly what’s going on in your inbox, in real-time. Customize notification settings to get all of the reminders you need, and none you don’t.
• All. The. Platforms. Shift works beautifully on Windows, Mac, and Linux - independent of a browser, and grouped by account.

Shift Basic is free to use. Additional pricing info can be found here.