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.
Tricount - Manage and share expenses with friends
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.
Kittysplit - The easiest way of sharing costs with a group of friends
Zabbix - Track, record, alert and visualize performance and availability of IT resources
ihatemoney - Manage your shared expenses, easily