Free and open source.
StrixGeo is licensed under the GNU AGPL-3.0-or-later. Windows 10 and 11. The installer is not code-signed yet, so Windows shows a SmartScreen warning the first time; choose More info and Run anyway.
Every release and its notes: github.com/Vorsie/strixgeo/releases.
Build from source
The source, the build instructions and the issue tracker are on GitHub. Contributions are welcome; see CONTRIBUTING.md.
Support the project
StrixGeo costs nothing. If it saves you time, you can sponsor the development on GitHub.
The licence terms are on the Licence page. StrixGeo is a desktop application; your project data stays on your own machine.