Slackin - Create your own public Slack chat community
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Hamster Pad - A social network built on top of Slack
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Mio - Powering seamless communication between workplace chat apps.
Better Uptime - We call you when your website goes down