
Description: Letterspace is an open-source word processor focused on writing and editing long-form texts like novels and essays. It has a clean, distraction-free interface with features like syntax highlighting, markdown support, and custom themes.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Idea Notebook is a free, open-source note taking app for capturing thoughts, ideas, and to-do lists. It has basic formatting options and organizational features to take notes quickly.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API