PagerDuty - Cloud based monitoring service
Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
OpsGenie - Alerting and On-Call Management for Dev&Ops Teams
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Squadcast - Automate incident response, reduce downtime and enhance your tech teams’ delivery with a unified platform.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.