
Description: Zero Brush is a free and open-source digital painting program for Windows, macOS and Linux. It features a wide range of brushes, layers, filters and supports many file formats. It aims to provide a lightweight yet powerful painting app for digital artists.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Paint 3D is a free creative application developed by Microsoft for 3D image creation. It allows users to easily model 3D objects and environments with basic geometric shapes and textures. Key features include 3D model importing/exporting, 2D image editing, remixing community models, and sharing creations online.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API