Beyond Compare - Beyond Compare allows you to compare files and folders.
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.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
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.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
Zabbix - Track, record, alert and visualize performance and availability of IT resources