
Description: Doppler is a feature-rich open source alternative to Postman for API testing and development. It provides an intuitive interface to send HTTP requests, inspect server responses, generate code snippets, mock servers, and automate workflows.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: AIMP is an audio player for Windows that supports many file types and includes features like skins, plugins, and customizations. It is lightweight, easy to use, and a good alternative to more complex media players.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API