Rectangle moves and resizes Mac windows with keyboard shortcuts and screen- edge snapping — halves, quarters, thirds, maximise, and more. It is a focused, open-source take on the window management macOS doesn't provide out of the box.

Highlights

Free, open source, and lightweight
Sensible default shortcuts that just work
No account or telemetry
Pro upgrade available if you want more

Watch-outs

Mac only
Advanced layouts require paid Pro
Window management only — single purpose

Good for

Window management

Rectangle is the default free answer to Mac window management: install it, learn a few shortcuts, and stop dragging windows by hand. If you want fancier layouts there is a paid Pro, and PowerToys' FancyZones covers the same need on Windows — but on macOS, free and open source, Rectangle is the easy recommendation.

When to use it

mac_users
keyboard_driven_workflows
open_source_advocates

Avoid if

not_on_mac
want_an_all_in_one_utility_suite

Free

Free tierOpen source

Rectangle is free and open source (MIT). A separate paid "Rectangle Pro" adds advanced layouts and gestures.

Keyboard shortcuts
Native
Open source
Native

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Rectangle

Highlights

Watch-outs

Good for

When to use it