<a href="https://github.com/aleksey-hoffman/sigma-file-manager" target="_blank" rel="noopener nofollow">Sigma File Manager</a> is a free, fast growing, modern open source file manager (explorer/browser) application for Windows and Linux.

GitHub Community

Sigma File Manager is a free and modern open-source file management application designed for Windows and Linux. It is highly customizable and rapidly evolving, making it a competitive tool for efficient file browsing and management.

Sigma File Manager – Free, Quickly Evolving, Modern File Manager

I am sorry, but I don’t like the approach: a file manager should be really close to the hosting operating system and needs to be extremely fast: it has to be written in a native language like C or Rust, not an Electron application written in Javascript.
On Linux, try to open a big folder like /usr/bin and see what I mean.

Not supporting macOS doesn’t sound very sigma.

I think this is the most creative approach to file manager I’ve ever seen

<h2>Love it!</h2>
Very smooth going from one place to the other. Looking forward to using it more.