GlassWire - Visualize network activity in detail, get notified when new apps access the network, look out for...
OpsDash - All-in-one solution for monitoring servers, services, uptime and databases. Curated Dashboards. Rule-based alerting.
NetBeez Remote Worker Agent - Simplifying tech support of work from home users.
NIXStats - SaaS monitoring tool for window/linux servers and websites. Think up-time robot but with more features.
Loading - See when apps are using your network in your Mac menubar
Monitornator - Server monitoring made simple