Top 3 Open-Source Alternatives to Reactivepad

All-in-one workspace. One tool for your whole team. Write, plan, and get organized.

Logseq is a local-first, non-linear, outliner notebook for organizing and sharing your personal knowledge base.

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.