- Honestly, I don't think there is a "best", but this one is pretty awesome, affordable, and usually ranks in the Top 5 Top Paid apps on the App Store. I use it and it's combo of using either keyboard shortcuts and/or grid system is great.
- I like Spectacle because of the hotkeys - super efficient, free.
- This is one of the few software that I actually paid for when I was a student. It's "Magnet for Mac" on steroids. I use shortcuts like a ⌘+option+, to put a window on left half of the screen, ⌘+option+. for right half, ⌘+option+control+, to move a window to the left desktop, and etc. You can customize anything, and even make macros.