Heimer is a desktop application for creating mind maps, diagrams and visual notes. It provides a canvas on which users can arrange nodes, connect related ideas and add text to describe relationships. The application is suitable for brainstorming, planning projects, studying and other activities where a graphical representation of information is more useful than a conventional list or document.
Heimer focuses on direct manipulation of diagram elements rather than complex document management. Nodes can be added, repositioned and connected using the graphical interface, while layout optimisation and grid controls help keep diagrams organised. Maps are saved in a dedicated file format and can also be exported as images. The application provides automatic saving and loading, making it practical for maintaining diagrams across editing sessions.
This is free and open source software.
Key Features
- Create mind maps, diagrams and visual notes.
- Add and remove nodes using graphical editing controls.
- Connect nodes and provide descriptive labels for their relationships.
- Customise node colours and background colours.
- Use automatic layout optimisation to arrange diagram elements.
- Configure grid spacing and snap nodes to the grid.
- Zoom in, zoom out and fit diagrams within the available window.
- Control zooming using the mouse wheel.
- Save and load maps using the XML-based ALZ file format.
- Automatically save and load map data.
- Export diagrams as PNG and SVG images.
- Undo and redo editing operations.
- Use animated transitions during editing and navigation.
- Choose the interface language through a dedicated menu.
- Provide translations including English, Finnish, French, German, Spanish, Chinese and Portuguese.
- Cross-platform support – runs on Linux and Windows.
Website: github.com/juzzlin/Heimer
Support:
Developer: Jussi Lind
License: GNU General Public License v3.0

Heimer is written in C++. Learn C++ with our recommended free books and free tutorials.
Related Software
| Mind Mapping Software | |
|---|---|
| TreeSheets | Free form data organizer |
| View Your Mind | Excellent tool to generate and manipulate maps |
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| h-m-m | Create mind maps in the terminal |
| Semantik | Produce complicated documents very quickly and efficiently |
| FreeMind | Visualise ideas, projects, brainstorming, concepts, internet research |
| Heimer | Simple cross-platform mind map and note-taking tool written in Qt |
| Mindolph | Personal knowledge management software with Gen-AI support |
| TeamMapper | Collaborative web app for creating and sharing mind maps |
| WiseMapping | Web-based mind mapping tool |
| tmmpr | Terminal mind mapper |
| myMarkmap | Create interactive mind maps directly from Markdown |
Read our verdict in the software roundup.
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