
Description: TheChecker.co is a free plagiarism detection tool that helps students and writers check their work for copied content. It allows users to upload documents and scan them against the web and proprietary databases to identify similarities and potential plagiarism issues.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Freemium Email Verifier is a free email verification service that allows you to validate up to 250 email addresses per day. It checks if email addresses exist and are deliverable.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API