Qikipedia - Instant Wikipedia summary cards on any web page
Platypus - Realtime server monitoring and reporting
Read Something Great - A fun tool to help fix your information diet.
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.
Wonder for Slack - Remember the things your team forgets
Nagios - Complete monitoring and alerting for servers, switches, applications, and services