The cross-platform UI that Factor has works on macOS, Windows, and Linux. On Linux, it unfortunately still uses a GTK2-GLext project for the OpenGL widget that we render into, but modern GTK3/4 has a Gtk.GlArea that we need to switch to using which will improve the compatibility on Wayland. However, it works fine with even the latest Ubuntu 25.10 release.
And of course, you could use other libraries easily, such as Raylib: