The best open source Mind Mapping alternative to Freeplane is TreeSheets. If that doesn't suit you, our users have ranked more than 50 alternatives to Freeplane and 16 are open source Mind Mapping Tools so hopefully you can find a suitable replacement. Other interesting open source Mind Mapping Tool alternatives to Freeplane are FreeMind, PlantUML, Heimer and MindMapVault.
A "hierarchical spreadsheet" that is a great replacement for spreadsheets, mind mappers, outliners, PIMs, text editors and small databases.
Netherlands
EU
Free and open source, Java-based mind-mapping app for the desktop featuring a hierarchical editor that emphasizes folding.
GermanyEU
PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams. The generator can be run anywhere within JVM and integrated with various application such as wiki, text editor, IDE, programming language, documentation generator, and others.
FranceEU
Heimer is a desktop application for creating mind maps and other suitable diagrams. It's written in Qt and targeted for Linux and Windows.
MindMapVault is a mind mapping and note-taking app with client-side encryption. It offers three versions: a free FOSS desktop version that doesn't require an account and stores data on your machine, a hosted version with optional encrypted sync, and a self-hosted version...
CzechiaEU
VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts. Such maps can help you to improve your creativity and effectivity. You can use them for time management, to organize tasks, to get an overview over complex contexts, to sort your ideas etc.
GermanyEU
TiddlyMap is a TiddlyWiki plugin that turns your favourite personal note taking software in a wiki-concept-map hybrid! Yes, you will be able to do both: drawing maps and putting down knowledge in a wiki way.
GermanyEU
What is Minder? Minder is a mind-mapping application with many features that make it ideal for capturing, organizing and visualizing your ideas. Minder has automatic node layout features.
Creates diagrams from textual descriptions! It provides a unified API with support for BlockDiag, BPMN, Bytefield, C4 (with PlantUML), Ditaa, Erd, GraphViz, Mermaid, Nomnoml, PlantUML, SvgBob, UMLet, Vega, Vega-Lite, WaveDrom.
Mindmapping made simple: Host and create your own mindmaps. Share your mindmap sessions with your team and collaborate on mindmaps.
Semantik (formerly kdissert) is a mind-mapping application for KDE that helps creating documents such as reports or presentations.
