Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.
AppDynamics - Get real-time insight from your apps using Application Performance Management—how they’re being used, how they’re performing, where they need help.
Codeship - Codeship is a fast and secure hosted Continuous Delivery platform that scales with your needs.
Zabbix - Track, record, alert and visualize performance and availability of IT resources