Boomerang Respondable - Write perfect emails with Artificial Intelligence
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Mailbutler - Mailbutler adds lacking functionality to email clients and increases your productivity
OneBar - AI-powered Q&A knowledge base for Slack teams
Boomerang for Gmail - Boomerang for Gmail is a Firefox / Chrome plugin that lets you take control of when you send and receive email messages.
Obie.ai - Access knowledge quicker without leaving Slack