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.
Bloomerang - Bloomerang is a simple donor database and fundraising software solution that helps nonprofits decrease donor attrition and increase revenue.
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.
Kindful - Nonprofit donor database + fundraising tools all in one
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Classy - Expressive, flexible, and powerful stylesheets for native iOS apps