
Description: SiYuan is an open-source cross-platform note taking and knowledge management software. It offers a variety of features including hierarchical note organization, WYSIWYG rich text editing, Markdown support, tag management, powerful search, offline access, and cross-platform sync. The intuitive interface and flexibility makes SiYuan a great alternative to apps like Evernote and OneNote.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Tangent Notes is a free, open-source note taking app for Windows, Mac and Linux. It allows you to take notes, annotate PDFs, organize research papers and more. Key features include backlinks, Markdown support, tabs and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API