
Description: Twodio is a free online audio editor that allows you to record, edit, and collaborate on audio projects in the browser. It has basic editing features like cut, copy, paste, and provides effects and filters for polishing audio.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: PenPal World is a pen pal matching service that connects people from around the world to exchange letters and emails. It allows users to find pen pals based on shared interests, language learning goals, age groups, and regions of the world.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API