Open-source alternatives to Rectangle

AeroSpace is a tiling window manager for macOS that automatically arranges application windows into grid-based layouts. It functions as a keyboard-driven controller, allowing users to manage window positioning, workspace navigation, and display assignments entirely through customizable keyboard commands. The project distinguishes itself by operating as a background daemon that utilizes system-level accessibility frameworks and low-level window server hooks to enforce tiling behavior. It employs a declarative configuration system to define layout rules and maintains workspace consistency throu

yabai is a tiling window manager and workspace orchestrator for macOS. It uses a binary space partitioning algorithm to automatically arrange application windows into non-overlapping rectangular regions to maximize screen real estate. The project provides a command line interface for controlling windows, displays, and virtual spaces, enabling the creation of custom desktop automation scripts. It includes capabilities for managing virtual desktops and disabling system animations to increase navigation speed. The system also supports mouse-based window focus, which automatically shifts the act

Spectacle is a keyboard-driven window manager and organizer that uses system accessibility frameworks to manipulate window coordinates and dimensions. It allows for the arrangement, resizing, and movement of application windows across multiple displays using global keyboard shortcuts. The tool focuses on multi-monitor layout management, enabling users to shift active windows between connected displays and snap windows into predefined screen regions such as halves, thirds, or corners. It also provides the ability to center and maximize windows to optimize screen real estate without using a mou

Loop is a desktop window manager and layout automator designed to control application window positioning and resizing. It utilizes custom keyboard shortcuts and scripted sequences to organize workspace layouts and automate window movements. The tool features a radial window arranger that moves and scales windows using a directional cursor interface and radial coordinate inputs triggered by modifier keys. It also includes an edge window stashing utility that hides windows beyond display boundaries and restores them via hover events to optimize screen real estate. Additional capabilities inclu

i3 is a configurable tiling window manager for the X11 window system. It organizes application windows into non-overlapping tiles to maximize screen real estate, utilizing a dynamic layout engine that removes the need for manual positioning or resizing. The system is designed for keyboard-driven desktop workflows, where window organization and behavior are defined through a plain text configuration file. It enables X11 desktop customization by allowing users to programmatically define layouts and keybindings. The manager provides inter-process communication via a Unix domain socket, allowing

escrcpy is an Android device mirroring tool and ADB device manager that enables the display and control of Android screens on a computer via USB or network connections. It functions as a multi-device screen orchestrator, providing a visual interface to arrange and control several mirrored device windows in parallel layouts. The project distinguishes itself as an automation controller that utilizes large language models to translate natural language instructions into actionable device commands. It further differentiates its capabilities by acting as a reverse tethering client, allowing a compu

Awesome is a programmable tiling window manager for the X11 Window System. It functions as a dynamic window manager that automatically arranges application windows into non-overlapping tiles based on predefined layout rules to maximize screen space. The project provides a scriptable desktop environment where system behaviors and layouts are defined through an embedded Lua interpreter. This allows for the creation of a personalized interface and a keyboard-driven workflow for managing application windows. The system covers dynamic window layout management and the configuration of system behav

This project is an X11 window system server that coordinates graphical output and input devices. It functions as a display server, a hardware driver manager for graphics and input modules, and a graphics server capable of rendering directly to a generic framebuffer. The server provides multi-seat display management to isolate input and display devices for different concurrent users. It also implements namespace isolation to separate clients and restrict resource access, preventing interference between different user sessions or processes. The system manages GPU driver integration through dyn

bspwm is an X11 tiling window manager that organizes application windows into non-overlapping rectangular tiles using binary space partitioning. It treats the screen as a tree of rectangular regions to automatically manage window placement and is compliant with Extended Window Manager Hints. The project is distinguished by a socket-based window controller, which allows layout changes and configuration settings to be updated via a communication socket rather than through a built-in configuration file. It provides independent window tree management for each detected monitor, treating every dis

Kit is a desktop automation framework and scriptable UI toolkit designed for building personalized productivity tools. It serves as a cross-platform CLI wrapper and macOS system automator, providing an environment to execute scripts that manage operating system tasks, file management, and application workflows. The project distinguishes itself with a dedicated LLM integration layer for structured data extraction and text generation, alongside a specialized UI framework for creating interactive input forms, HTML windows, and floating widgets. It features deep macOS integration through AppleScr

Notable is a local-first markdown note-taking application designed for managing personal knowledge bases. It functions as a document management system that stores all notes and attachments as plain text files directly on the local disk, ensuring data ownership and compatibility with external file-system tools. The application prioritizes a keyboard-centric workflow, utilizing a command-palette-driven interface to facilitate rapid navigation and content manipulation. It provides a distraction-free writing environment that allows users to hide interface elements, helping to maintain focus while

This is a framework for building desktop applications that reside in the system tray using Electron. It functions as a system tray integration library and window manager, providing the necessary components to handle native tray icons, tooltips, and the associated window lifecycles for menubar applications. The framework coordinates native system tray interactions with web-based user interfaces. It maps application commands to the operating system's native menu system and orchestrates the visibility and positioning of child windows relative to tray icon click events. The project covers native

This project is an automatic tiling window manager and a GNOME desktop interface extension. It functions as a keyboard-driven window orchestrator that organizes application windows into non-overlapping grids using a hierarchical tree structure to subdivide and rearrange screen space. The system provides a multi-monitor layout manager that handles window placement across multiple display outputs and automatically re-tiles when monitors are connected or disconnected. It includes a searchable, asynchronous interface for launching applications, system settings, and locating open windows. The sof

Eww is a declarative framework for creating custom graphical desktop widgets and status bars on Linux. It functions as a desktop widget toolkit that operates independently of the window manager, allowing users to define interface elements through a dedicated configuration language and style them using a cascading stylesheet system. The project utilizes a client-server daemon architecture to manage the lifecycle of these components, ensuring that state is maintained across the desktop environment. By leveraging a reactive state binding system, the interface updates automatically in response to

Whisky is a compatibility layer and virtual environment manager designed to run Windows applications and games on macOS. It functions by creating isolated containers that house separate filesystems and registry hives, ensuring that software dependencies remain independent of the host operating system. By translating Windows system calls into native equivalents, the tool enables the execution of non-native binaries within a managed environment. The project distinguishes itself through a comprehensive suite of configuration and optimization tools that allow users to tune graphics rendering, inp

snacks.nvim is a comprehensive collection of quality-of-life plugins and utilities designed to extend the core functionality of Neovim. It serves as a multi-purpose toolkit providing a UI framework, navigation enhancements, and integrations with external services. The project distinguishes itself by combining a wide array of specialized tools into a single suite, including a picker-based file explorer, a deep GitHub integration for managing issues and pull requests, and a set of development utilities for profiling Lua performance and inspecting code execution. Its broader capability surface

BrowserOS is an AI agent browser orchestrator and automation framework designed to manage browser state and execute complex web workflows. It functions as a local AI browser assistant and a Model Context Protocol controller, enabling the control of browser tabs, windows, and navigation through programmable AI agents and standardized context protocols. The system distinguishes itself through a graph-based visual workflow builder for creating repeatable automation sequences and the use of markdown-based files to define agent personalities and task recipes. It supports multi-provider orchestrati

Phoenix is a macOS workspace automator and window manager that uses a JavaScript scripting engine to control system-level behaviors. It functions as an AppleScript automation bridge, allowing users to programmatically manipulate application states, window geometry, and desktop interactions. The project enables the creation of custom workflows by binding keyboard shortcuts to JavaScript functions. This allows for the automation of complex system actions, such as organizing application layouts across multiple screens and managing virtual spaces. Its capability surface covers window and applica

AutoHotkey script to open, restore or minimize, Window's and Chrome's Apps using hotkeys

Enhancements on original WindowPad (by Lexikos)

Tiling Window Manager for Windows

ShiftIt is a macOS window manager and tiling utility that enables the resizing and positioning of application windows through predefined keyboard shortcuts. It functions as a shortcut manager to automate window movement and workspace organization. The utility specializes in tiling windows into proportional widths and heights. It includes a dimension cycling feature that rotates window sizes through a set of predefined ratios using directional keyboard inputs.

Replacement for Windows/Aero Snap (especially for widescreen monitors).

Viewers is a zero-footprint DICOMweb medical imaging viewer and a modular plugin framework. It serves as a diagnostic interface for rendering 2D and 3D medical images, providing a web-based clinical workflow engine to automate image layouts and toolsets. The project distinguishes itself through a highly extensible architecture that allows for the development of custom clinical workflows, specialized viewing modes, and the integration of external functional extensions. It includes a dedicated command line interface for managing these plugins and supports white-labeling through a comprehensive

KeymouseGo is an input automation tool and macro recorder designed to capture, edit, and replay keyboard and mouse sequences to automate repetitive desktop tasks. It functions as a scriptable input automator that translates recorded user interactions into reusable blueprints for automated playback. The system distinguishes itself through a logic-based scripting framework that supports conditional branching, sub-routine calls, and jump-to-labels for complex workflow control. It further extends runtime behavior via a plugin system that allows for the registration of custom functions to modify t

Backstage is an open-source framework for building internal developer portals. It provides a centralized, metadata-driven software catalog that tracks ownership, dependencies, and lifecycle status for all technical assets by harvesting configuration files directly from version control systems. The platform is built on a plugin-based modular architecture, allowing teams to extend core functionality through isolated, independently deployable modules that integrate into a unified frontend and backend ecosystem. The project distinguishes itself through its focus on developer productivity and stan

This project is a command-line interface that bridges local development workflows with remote platform services. It functions as a terminal-based platform client, enabling users to manage repositories, issues, and pull requests directly from their command line through authenticated API interactions. The tool provides a modular environment that supports custom binary extensions and command aliases, allowing developers to tailor their terminal experience to specific project needs. Beyond standard repository management, the tool serves as a remote development manager, offering capabilities to pr