Apps similar to Rectangle include Microsoft PowerToys, which is free and open source. Other options are DisplayFusion, BetterTouchTool, AquaSnap and Loop - Window Management. Window Managers like Rectangle are a crowded field, with more than 100 alternatives for Mac, Windows, Linux and Android.
Window management tool enabling creation of custom zones, drag-and-snap, keyboard shortcuts, automated window assignments, layout editor with templates, GPU overlays, multi-monitor layouts, virtual desktop and activity support, plus KCM integration for easy configuration.
United States
Taekwindow is a simple, lightweight and free Windows program that allows you to move and resize windows by dragging them with the Alt key, similar to many X11 window managers.
Annoyed again because one of your apps is offscreen? Do you have to struggle with keyboard shortcuts, to bring it back or do they not work again? Borderline moves all windows back into the screen bounds.
FlowShelf a free Mac app that turns your notch into a Dynamic Island and gives everything you copy, drop, or screenshot a temporary home.
Australia
Workflo automatically arranges the windows on your Mac: it opens the apps you need, moves and resizes every window the way you set it, and clears the rest, before a call, before a focus block, and every time you dock or undock.
India
Snapset is a workspace manager for Mac that saves and restores apps, window arrangements, browser tabs, and Finder folder locations. Create layouts for different tasks and switch using keyboard shortcuts, the menu bar, or voice commands processed locally on your Mac.
Arrange macOS windows into halves, thirds, quarters, or custom grid layouts using live previews, drag actions, or fully remappable shortcuts. Restore positions with one key, move windows across displays, manage layouts via the menu bar, and customize every action.
Japan
Native Windows 11 app that runs truly independent image slideshows on each monitor — own folder, own pacing, own transitions per display.
United Kingdom
Plonk is a menu bar app for macOS that bundles a window manager with nine additional desktop utilities, so one icon replaces a stack of single-purpose tools.
Window management utility on macOS enabling window snapping, 2- and 3-zone layouts, app rotation, keyboard and trackpad gesture controls, plus overview mode for fast app assignment and switching, offering efficient multitasking in customizable zones.
South Korea
Free macOS window manager that saves and restores your entire workspace layout with one keystroke. Every app, every window position, every display. Includes window snapping, drag-to-snap, and unlimited named workspaces.
Mexico
