You don't even have to have a third party app to snap left||right or maximise via the keyboard, as these are available (behind Option either in the menu or when hovering over the traffic lights, but once you bind them they're always there, example is my bindings):
Ctrl+Option+Return: Zoom
Ctrl+Option+Left: Move Window to Left of Screen
Ctrl+Option+Right: Move Window to Right of Screen
And for multihead users there's "Move to <display name>".Again in Keyboard pref pane, Shortcuts tab, under Mission Control there's also Switch to Desktop 1-N keyboard shortcuts but you first have to create as many virtual desktops (a.k.a Spaces) as you want to have all the shortcuts show up. Make sure to disable "Automatically rearrange Spaces based on most recent use" under Mission Control pref pane to keep them predictable. Since the total count is spread across display heads, I create 5 on my left screen and 5 on my right one. I also disable "When switching to an application, switch to a Space with windows open for that application", otherwise clicking on a Dock icon jumps me to another Space when I just want to have the app activated. As a i3 user on Linux (which of course is in another league) this brings macOS kind of close enough in behaviour to not be too jarring for me when I jump from one to the other.
Another one of my favourites is Paste and Match Style, which is absolute genius.