Ripcord - A desktop chat client for Discord and Slack

Drift - A messaging app that helps you grow your business.

Dialog Messenger - handy and feature-rich enterprise multi-device messenger available for server or cloud – Slack-like, but not Slack-limited

Timy - Best way to send scheduled messages in Slack

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.

Annotable - Ultimate image annotation & markup tool