Joplin
Description: Joplin is an open source note taking and to-do application with markdown support, organization tools and end-to-end encryption. It is available on Windows, macOS, Linux, iOS and Android.
Type: software
Pricing: Open Source
Wekan
Description: Wekan is an open-source kanban board web application. It allows users to create and view kanban boards to track projects and tasks.
Type: software
Pricing: Open Source