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.
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
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.
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.