Developers behind Redox OS, the original open-source operating system written from scratch in the Rust programming language, have ported Wayland to it with initially getting the Smallvil Wayland compositor up and running along with the Smithay framework and the Wayland version of the GTK toolkit.
The Redox OS project published their November 2025 status update where one of their main accomplishments for the past month is getting these initial Wayland components up and running on it. Before getting too excited though, they note that the Wayland compositor’s performance is “not adequate” and thus more work to do on their Wayland support but an exciting first milestone
KHTML was forked. And kept open source. And the fork was so successful that even KDE switched to it (voluntarily).
And Apple employed a bunch of the KHTML developers for years. They still do I assume.
Oh, and one of them is now creating what will probably be the most successful independent web browser project ever—Ladybird.
Solid example.