NIXStats - SaaS monitoring tool for window/linux servers and websites. Think up-time robot but with more features.
N-able Backup - Backing up your data and data protection has never gotten easier.
Server Monitoring - A server monitor is a tool that monitors your server and website on close intervals and reports to you if it's inaccessible.
Noction Flow Analyzer (NFA) - Powerful, Feature-rich, Affordable in-depth traffic analysis system, built with network engineers in mind.
Nodeping - NodePing Server Monitoring and Web Site Monitoring. Simple but powerful Internet service monitoring.
SolarWinds Orion Platform - SolarWinds Orion Platform is an infrastructure monitoring and management solution that has been designed to streamline and manage the composite and physically dispersed IT infrastructure.