Papermind - Papermind Slack App is a collaborative article-editing and document management platform for Slack
Quip: Team Documents for Slack - Create, share and get notified about Quip docs in Slack
Trainual + Slack Integration - Capture knowledge or access training right inside Slack
Workflowy - A better way to organize your mind.
Graphite - Graphite is a highly scalable real-time graphing system.
Sismics Docs - Lightweight full-featured document management system 📁