Hummingbird is described as 'macOS utility that allows easy moving and resizing of windows by holding modifier keys and dragging your mouse to move and resize windows' and is a Window Manager in the OS & Utilities category. There are more than 50 alternatives to Hummingbird for a variety of platforms, including Mac, Windows, Linux, PortableApps.com and Windows Explorer. The best alternative is Rectangle, which is both free and Open Source. Other great apps like Hummingbird are AquaSnap (Freemium), WindowGrid (Free), BetterTouchTool (Paid) and Sizer (Free).
Penc is a window manager app for macOS designed for use with the trackpad. It lets you use trackpad gestures along with the Command key to move, resize and snap windows to the screen. HOW IT WORKS - Double press and hold Command Key (?
BetterSnapTool is a utility that mimics Windows 7 Aero snap, allowing you to easily manage your window positions and sizes by either dragging them to one of your screens corners or to the top, left or right side of your screen.
Amethyst is a tiling window manager for Mac similar to the xmonad tiling window manager popular on Linux. Amethyst is written in Objective-C and has configurable shortcuts, multi-monitor support, multiple layouts, and the option to float certain applications.
HyperDock adds Windows 7 like features and more to Mac OS X. Select individual application windows & tabs just by moving the mouse on a dock item, use mouse clicks to quickly open new windows and many more.
KDE Mover-Sizer is a lightweight program enabling KDE-style alt-click moving and resizing for Windows XP, 7, 2000, 2003, Windows Server, and Vista. It is a background application that emulates the behaviour of KDE, which is a rather good Linux desktop environment.