Fing is a free network scanner for mobile phone.

Domotz Pro Remote Network Monitoring Software and Network Management System.

Pushover is a simple push notification service that integrates easily into web apps like IFTTT, network monitors like Nagios, shell scripts, servers, etc.

Dynatrace APM tools provide user experience analysis that identifies and resolves application performance issues faster than ever before.

PingPlotter helps solve network problems. It's a network diagnostic tool that graphs latency and packet loss between your computer and a target.

apptalk.ninja is a mobile app monitoring software.