Which apps support Split View?

[PowerBook-G5]

Is Split View supported by all apps that can go fullscreen, or is it only for certain apps? For example, can iTunes and Mail go next to each other?

 

[Superhai]

I think there other threads that answer this as well, but yes all apps that may go fullscreen are supported for now. Even non-fullscreen apps, if you first split a fullscreen app. I think all who have the green button can go into split-screen together with a full-screenable app.