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.
N-able Backup - Backing up your data and data protection has never gotten easier.
NIXStats - SaaS monitoring tool for window/linux servers and websites. Think up-time robot but with more features.
NMIS - NMIS is an IT Infrastructure Network Management platform that allows you to perform multiple functions, including fault, configuration, performance, accounting, Device, and security management.
Nodeping - NodePing Server Monitoring and Web Site Monitoring. Simple but powerful Internet service monitoring.
Noction Flow Analyzer (NFA) - Powerful, Feature-rich, Affordable in-depth traffic analysis system, built with network engineers in mind.