Schedule emails to be sent at a later date.

Discover any email address by searching for companies or people. Emails display directly in Gmail, and include your contacts. The tool also provides details about the contact (location, business details, etc.). 

This service automatically creates and updates contact information (title, company, phone, etc.) from email signatures into address books and/or CRMs.

Grammarly makes sure everything you type is easy to read, effective, and mistake-free. It links not only to Gmail, has a download for use with Outlook, but can also be used with other programs such as Twitter, Tumblr, LinkedIn, and nearly anywhere else you write on the web.

Merges your email box and your to-do lists.

Put new messages on hold.

This app allows you to turn emails into tasks, as well as many other features.

This website has great email drafts you can utilize to make your own.

This is an email optimizer for Gmail. It helps to track messages, schedule and send, book meetings, write from email templates and automate correspondence.

Get LinkedIn profile information about the sender of an email right inside your Gmail inbox.

This website has great email drafts you can utilize to make your own.

This tool learns what email is important to you and filters out what isn't.

This app helps make sense of email clutter by intelligently organizing messages into categories. It's fully customizable.

This tool allows you to check your email message for a negative tone of voice.

This website lets you see a list of all your subscription emails and unsubscribe easily from whatever you don’t want.

Automate tasks, including delaying emails.