Move and resize windows with ease. Spectacle provides window control with simple and customizable keyboard shortcuts.
Simplicity, configurable keyboard shortcuts, doesn't get in your way, free and opensourceCons:
No mouse dragging behaviour
I like this tool. It's simple, free and doesn't get in your way. You just set the hotkeys you want to use and manage your windows with comfort. It's also open source: https://github.com/eczarny/spectacleAlexey Alekhin has used this product for one year.