PagerDuty - Cloud based monitoring service
POP (Prototyping on Paper) - POP helps you make interactive prototype with ease. If you can draw, you can design apps.
OpsGenie - Alerting and On-Call Management for Dev&Ops Teams
Invision - Prototyping and collaboration for design teams
Squadcast - Automate incident response, reduce downtime and enhance your tech teams’ delivery with a unified platform.
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.