
Description: HackerTarget.com is a free online web application security scanner and network security scanner. It can scan websites for vulnerabilities, check network security, test SSL encryption and perform many other security assessments.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: GRC Port Scan is a free network scanner that checks open TCP and UDP ports on a target computer or device. It can scan common ports or a custom range, and has useful features like port mapping and reporting.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API