You could look at KDE, I don't know about the quality but it's a big enough public effort that it should be well reviewed. https://en.wikipedia.org/wiki/KDE_Pro

You could look at KDE, I don't know about the quality but it's a big enough public effort that it should be well reviewed. https://en.wikipedia.org/wiki/KDE_Projects https://en.wikipedia.org/wiki/KDE_Projects