PagerDuty - Cloud based monitoring service
ShoreTel - Cloud phone system & contact center software & services
OpsGenie - Alerting and On-Call Management for Dev&Ops Teams
CorvisaOne - CorvisaOne is another cloud-based communications suite that is specially designed for companies that need features for managing inbound or outbound call centres.
VictorOps - We make on-call suck less & help teams to solve problems faster.
8x8 X Series - X Series connects teams across channels and around the globe, giving you access your most critical information securely, from any location.