Dialog Messenger - handy and feature-rich enterprise multi-device messenger available for server or cloud – Slack-like, but not Slack-limited
OneBar - AI-powered Q&A knowledge base for Slack teams
Ripcord - A desktop chat client for Discord and Slack
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Done Hui - No need to switch between multiple pieces of software to get through the workday. CHATS: Communicate freely. CALENDAR: Know your team's availability, plan meetings. No more conflicts. TO-DOs: Stay on top of all projects. FILES: All files, one spot.
Slack It - A bookmarklet to share links in Slack with one click