
Description: Cacher is an open-source alternative to Postman, allowing users to build, test and share APIs. It has collaboration features like workspaces, comments and permissions to work with teams.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: 3Cols is a free and open-source browser extension for Google Chrome that allows you to view three columns on many websites. It helps increase productivity when researching, reading articles, checking emails, online shopping, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API