Draw.Chat - Anonymous real-time whiteboard with text and video chat.
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.
Butter - Butter is a newly launched chatting application that focuses more on the privacy of its users.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Allo.io - Whiteboarding, documentation, and video chat in one place.
Better Uptime - We call you when your website goes down