Applivery - Mobile Apps distribution system for Continuous deployment, Beta testing, Feedback, Bug reporting & Enterprise App distribution.
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.
TestFlight - iOS beta testing on the fly.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Boombox.io - iOS devs rejoice! Embeddable HTML and hosted TestFlight beta sign-up forms.
Better Uptime - We call you when your website goes down