Papermind - Papermind Slack App is a collaborative article-editing and document management platform for Slack
Sismics Docs - Lightweight full-featured document management system 📁
Workflowy - A better way to organize your mind.
Graphite - Graphite is a highly scalable real-time graphing system.
Managify - Create & organize all your documents in a single platform.
BaSalt - Blockchain based documents managing/sharing platform