Snailbox - Schedule your email at specific times and recover the time you're losing to your inbox.
Rofocus Chrome Extension - Increase your focus and productivity with ambient sounds
Inbox When Ready - Protect your focus... hide your Gmail inbox by default
Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.
Moodly - Get a better sense of focus and relaxation by listening to ambient nature sounds.
PixelBlock - Block email open tracking inside of Gmail