VictorOps
PagerDuty
OpsGenie
xMatters
AlertOps
Squadcast
Freshservice
SolarWinds Service Desk
JavaScript
Python
Java
PHP
Rust
Haskell
Typescript
Elixir
VictorOpsPagerDuty - Cloud based monitoring service
Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
OpsGenie - Alerting and On-Call Management for Dev&Ops Teams
Java - A concurrent, class-based, object-oriented, language specifically designed to have as few implementation dependencies as possible
xMatters - xMatters transforms event data into intelligent communication IT teams, avoiding outages and disruptions
PHP - A popular general-purpose scripting language that is especially suited to web development