
Description: VirusTotal is a free online service that analyzes files and URLs to detect viruses, worms, trojans and other kinds of malicious content using multiple antivirus engines and website scanners.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: CheckURL.org is a free tool that allows you to test and diagnose issues with your website or web application. It checks for broken links, spelling errors, load times, SEO issues, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API