When comparing Divvy vs SMBAct, the Slant community recommends Divvy for most people. In the question“What is the best window manager for Mac?” Divvy is ranked 3rd while SMBAct is ranked 32nd. The most important reason people chose Divvy is:
Although it's not in the same level as something like bug.n, Divvy does support the use of keyboard shortcuts to move windows about. You can even create custom shortcuts.
Specs
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Pros
Pro Has keyboard shortcuts
Although it's not in the same level as something like bug.n, Divvy does support the use of keyboard shortcuts to move windows about. You can even create custom shortcuts.
Pro Requires virtually no configuration & is very easy to use
Divvy uses a drop and drag style UI that's simple to use and doesn't require any setup or configuration to get started.
Pro Reasonably configurable
You can change the grid dimensions and a very other visual settings to suit your needs.
Pro Super-fast access by defining your own hot key (mine Win+S)
Pro Window manager + switcher
SMBAct works not only as a tiling window manager, but also as a window switcher. This ensures smooth transitions from one functionality to another when you work with two monitors.
Pro Good for those who prefer the keyboard to the mouse
You can do everything with the keyboard. Many preset hotkeys for different actions, but you can set your own. Easy to find and activate any action even if you forget the hotkey through a special window with a quick search.
Pro User friendly
There is a video tutorial with detailed descriptions of how to use it. In addition, the program itself has a lot of tips.
Cons
Con Quite inconvenient to assign windows
You always have to use the mouse instead of having proper keyboard shortcuts.
Con No longer updated
While this may work for current machines, the last beta version (to be found on the site) is from January 2016.
Developer's twitter account has stopped being active as well, on November '16.
Con Windows 10 buggy
Not all keyboard shortcuts work. Support is non existent.
Con Installer requires admin rights, installs itself to AppData of the used account
Something to consider if would be used in a restricted environment.
Con Not free
Costs $14.
Con Not free
Can be used for free for a month right now, but it's generally available for a fee after free-trial: $14.00.
Con No possibility to snap to the edges and corners
They promise to add it in the next update, but it is currently not present.