
Description: DownNotifier.com is a free website monitoring service that allows users to enter URLs they want to track and receive notifications when those sites go down or back up. It monitors website uptime and sends email or SMS alerts about status changes.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: "Is it up?" is a simple website that allows users to check the status of other websites and web services. It functions by sending a request to the site or service entered and displaying whether it is up and responding or down.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API