ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.
ManageEngine M365 Manager Plus - Auditing, monitoring and reporting tool for Office 365
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
DareBoost - DareBoost is an online tool to test, analyze and monitor your website: speed, SEO, quality, security. All you need for website optimization in a single service.
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.
AppSignal - We monitor the software that makes your customers happy.