Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
MailClark - The Slack bot for external communications
OneBar - AI-powered Q&A knowledge base for Slack teams
Alert.email - Get your important emails delivered to a Slack channel
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
PigeonBot - Send emails via Slack with the /email command