
Description: Rebelle is a digital painting software focused on realistic and impressionist styles. It simulates the behavior of real artistic media like acrylic, watercolor, and oil paint. Key features include wet diffusion, color blending, base coats, resaturation, and a unique real-time stroke preview.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Black Ink is a digital handwriting app designed for creative professionals. It allows you to write, sketch, and illustrate using an Apple Pencil or other stylus for a natural pen-to-paper feel. Key features include pressure sensitivity, palm rejection, customizable brushes and color palettes.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API