Slack - A messaging app for teams who see through the Earth!
Stack Overflow Documentation - A crowdsourced developer documentation
Corilla - Collaborative documentation for software teams
Archbee.io - Archbee is a developer-focused product docs tool for your team. Build beautiful product documentation sites or internal wikis/knowledge bases to get your team and product knowledge in one place.
MailClark - The Slack bot for external communications
Slite - Your company knowledge