Heimer

Free plan LinuxWindows

What Heimer is

Heimer is a free desktop application for making mind maps, diagrams, and notes on Linux and Windows. The Qt-based tool provides automatic layout optimization and an adjustable grid for organizing diagrams. Editing includes full undo and redo, quick node text entry, and edge labels. Work can be loaded and saved in XML-based .ALZ files, with autoload and autosave available. Mind maps can be exported as PNG or SVG. Linux installation options include Snap, Debian packages, and AppImage, with the README recommending Snap. Windows users can choose an installer or a ZIP archive containing the executable. Listed interface translations include English, Basque, Chinese, Dutch, Finnish, French, German, Italian, and Spanish. Heimer is licensed under GNU GPLv3 and is described as a standalone application; project pages do not list third-party integrations. The Free plan costs nothing and is described as free forever.

Who it suits

Heimer suits Linux or Windows users who need a local tool for mind maps, diagrams, and notes. It is useful when PNG or SVG export and open-source licensing matter.

What it does well

Free forever plan
Automatic layout optimization and adjustable grid
Full undo and redo
PNG and SVG export
Linux and Windows installation options

What to know first

No macOS platform listed
No free trial
No third-party integrations listed

Plans

Plan	Billed and limits	Price
Free	Forever 100% free	Free

As github.com lists them, read 11 Oct 2026. The maker's own page has the final word.

Verdict

Heimer offers focused desktop diagram and note-taking tools with flexible saving, export, and installation choices. Its standalone design and lack of listed integrations make it primarily a local workspace.

Facts from Heimer's own pages

Editing: The app supports full undo and redo, and lets users quickly add node text and edge labels. · github.com, 11 Oct 2026
Export: Mind maps can be exported to PNG or SVG. · github.com, 11 Oct 2026
Export formats: PNG,SVG · github.com, 20 Sept 2026
Free plan: Yes · github.com, 20 Sept 2026
Integrations: The project pages describe a standalone Qt desktop application and do not list third-party integrations. · github.com, 11 Oct 2026
Languages: The README lists English, Basque, Chinese, Dutch, Finnish, French, German, Italian, and Spanish translations. · github.com, 11 Oct 2026
Layout: Features include automatic layout optimization and an adjustable grid. · github.com, 11 Oct 2026
License: Heimer’s source code is licensed under GNU GPLv3. · github.com, 11 Oct 2026
Linux downloads: Linux installation options include Snap, Debian packages, and AppImage; the README recommends Snap. · github.com, 11 Oct 2026
Linux package listing: The Snap Store lists Heimer version 4.5.0 on the latest/stable channel. · snapcraft.io, 11 Oct 2026
Note taking: The project describes Heimer as a mind map, diagram, and note-taking tool written in Qt. · github.com, 11 Oct 2026
Supported platforms: linux,windows · github.com, 20 Sept 2026
Purpose: Heimer is a desktop application for creating mind maps and other suitable diagrams. · github.com, 11 Oct 2026
Saving: Heimer supports autoload, autosave, and XML-based .ALZ files. · github.com, 11 Oct 2026
Security: The repository has a Security tab, but the opened security overview provides no security or compliance details. · github.com, 11 Oct 2026
Windows downloads: Windows downloads include an installer and a ZIP archive containing the Heimer executable. · github.com, 11 Oct 2026