ExDialer - ExDialer- Dialer and Contacts developed and published by Modoohut for Android and iOS devices.
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Bluff My Call - Bluff My Call app provides features to allow users to make prank calls to their friends and family members by changing their voice and caller ID in a few simple steps.
Better Uptime - We call you when your website goes down