Windows-Logo-Key + Left/Right Arrow -- Keyboard shortcut equivalent on Mac I have both a mac and a PC. One simple extremely useful feature on PCs that I can't find on a mac is the shortcut Windows+RightArrow to maximize the active window, but only take up exactly the right half of the screen (and vice versa with Windows+LeftArrow). 

It's extremely useful to be able to quickly do side-by-side comparisons without having to manually resize the windows, but I haven't found a similar shortcut on a mac. Does this exist for mac? Or is there a utility that allows this?
If you hold down the green fullscreen button, it gives you the option to split/share the screen with a second window