
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: USB Audio Player PRO is a music player app for Windows that plays audio files from USB drives. It supports playlists, equalizers, ID3 tag editing, and has a clean, customizable interface.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API