Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Slack - A messaging app for teams who see through the Earth!
Sidequest for Slack - Create and track personal or support team tasks, 100% inside Slack.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Roby - Refreshingly simple helpdesk for Slack & Teams users
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.