
Description: CoSketch is a free online whiteboard tool for collaborating on drawings, diagrams and sketches in real-time. It allows multiple people to visually brainstorm together with virtual sticky notes, shapes, diagrams, handwriting/drawing, and uploading images.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Skrbl is a free online whiteboard and sketching tool. It allows real-time collaboration for brainstorming sessions, presentations, teaching, and more. Skrbl has basic drawing tools and supports image imports.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API