AlertAgility

AlertAgility provides simple and powerful solution to incident management, which is easy to configure and use with even large scale environment.
ngDesk

ngDesk is the 100% free help desk software for unlimited users with ticket management, instant alerts, and AI integration. Complete. Completely Free.
Hosted Graphite

Graphite as a service.
OpsGenie

Alerting and On-Call Management for Dev&Ops Teams.
VictorOps

We make on-call suck less & help teams to solve problems faster.