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.
KeywordTool.io - KeywordTool.io is the best FREE alternative to Google Keyword Planner and Ubersuggest. It uses Google's autocomplete feature to get over 750+ long-tail keywords for any given query.
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 Trends - Explore Google trending search topics with Google Trends.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Keywords Everywhere - Free browser add-on for keyword volume, CPC & competition