I was about to complain loudly about bullshit patents, but then I took some time to read the actual patent (make sure to look at the images too!), and it turns out that this patent describes a method that is very similar to what Moom does (judging by screenshots). This is not a case of the overly broad patents that we usually complain about, this is a very precise patent.
So that should be interesting.
This patent may also cover the window arrangement widget in Adobe's products, which seems to date back to at least 2011 (google for 'adobe application frame'): http://egypt.urnash.com/media/blogs.dir/1/files/2017/05/Scre...
...but somehow I doubt they'll be suing Adobe until they've successfully gone after all the other folks who independently invented something similar to their patent.