
Description: Zettel Notes is a free, open-source note taking app for Windows that implements the Zettelkasten method. It allows hierarchical tagging and linking of notes to support creativity and knowledge management.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: TiddlyRoam is a free, open-source personal knowledge management tool. It allows users to take inter-connected notes and build a personal wiki using tiddlers that link to one another. Useful for note-taking, task management, and brainstorming.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API