Boomerang Respondable - Write perfect emails with Artificial Intelligence
Slack News Feed - Get the top posts from every Slack chat you're in.
Mailbutler - Mailbutler adds lacking functionality to email clients and increases your productivity
Slinky - Your slack links — organized!
Boomerang for Gmail - Boomerang for Gmail is a Firefox / Chrome plugin that lets you take control of when you send and receive email messages.
Slack Platform News - News and updates from the Slack Platform direct to your team