Trello for Slack - Organize anything with anyone, inside Slack

UptimeRobot - Free Website Uptime Monitoring

Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

StatusPage.io - StatusPage.io is the best way for web infrastructure, developer API, and SaaS companies to get set up with their very own status page in minutes. Integrate public metrics and allow your customers to subscribe to be updated automatically.

Halp - Slack-first ticketing for internal helpdesk

Freshworks - Delight your customers, from wherever you are