PagerDuty - Cloud based monitoring service
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
VictorOps - We make on-call suck less & help teams to solve problems faster.
ActiveWords - Auto correct on steroids
xMatters - xMatters transforms event data into intelligent communication IT teams, avoiding outages and disruptions
Zeplin - Collaboration app for UI designers & frontend developers