Clearbit for Slack - Send all signups directly to a Slack channel
OneBar - AI-powered Q&A knowledge base for Slack teams
Google Drive to Slack - Slack notifications whenever you work on Google Drive docs
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
MovetoSlack - Migrate from MS Teams to Slack in 5 minutes
Slack It - A bookmarklet to share links in Slack with one click