Sciter – Multiplatform HTML/CSS/JavaScript UI Engine for Applications
Note, Sciter does not embed a browser engine but reimplements the DOM/CSS/JS (via QuickJS) logic in C++ which means many familiar web patterns will work, many will not, and many might behave differently. Unlike Electron, Sciter will not be the best option to wrap an existing web app and expect it to work as a desktop app.Partial compatibility tables are at  https://sciter.com/developers/for-web-programmers/