Open-source alternatives to CotEditor

This project is a cross-platform code editor designed for software development, offering a comprehensive suite of tools for text editing, workspace management, and task automation. It includes native support for version control, an integrated terminal, and a flexible task runner that allows for the execution of build, test, and deployment workflows directly within the environment. The editor features an extensive AI-driven development assistant system, which provides conversational chat interfaces, inline code suggestions, and autonomous agents capable of executing multi-step coding tasks. Th

VimR is a native macOS graphical user interface for the Neovim editor. It wraps the Neovim binary within a Swift and AppKit application to provide system-level window management and OS integration. The application includes a project workspace manager for organizing files and windows into distinct contexts, a graphical file browser for navigating directory structures, and a fuzzy file searcher for locating files using approximate string matching. It also features a markdown and HTML previewer with synchronized side-by-side scrolling.

General purpose plain text editor for macOS. Widely known for its live collaboration feature.

Lite is a scriptable plain text editor and programmable editing environment written in Lua. It provides a minimalist interface for opening, modifying, and saving plain text documents. The editor is designed for extensibility, allowing users to define custom commands and behaviors through external Lua script modules. It supports a plugin system where new features are integrated by placing modules in designated directories for automatic loading at startup. The project covers a range of customization capabilities, including personalized keyboard shortcut mapping and visual theme overrides for c

MacVim is a native Cocoa application that implements the Vim modal text editor as a graphical user interface on macOS. It integrates the editor engine directly into a native window and event loop, allowing it to operate without a terminal emulator. The project functions as both a programming text editor and a hexadecimal binary editor. It provides tools for modifying raw binary data via a visual hexadecimal grid and applying patches to binary files. The editor features modal input handling, pattern-based syntax highlighting, and rectangular block selection. Additional capabilities include mu

Notepad3 is a lightweight Windows text editor designed as a replacement for the default system notepad. It is built on the Scintilla text engine to provide source code editing capabilities, including syntax highlighting, code folding, and automatic indentation. The editor is distinguished by its support for registry-free portable execution, allowing the application to run from removable storage without system installation. It features integrated file encryption and decryption tools for secure document management and a regular expression engine for complex search and replace operations across

Zed is a terminal-based code editor built in Rust that provides a full-featured editing experience with familiar keybindings, mouse support, and multiple cursors. It runs entirely in the terminal while offering capabilities typically found in graphical editors, including split panes, a command palette, and integrated language server protocol support for real-time diagnostics, completions, go-to-definition, and code actions across multiple languages. The editor distinguishes itself through a plugin system that runs sandboxed TypeScript plugins in a QuickJS runtime, with an asynchronous bridge

react-page is a browser-based visual content editor and schema-driven page builder developed with React and TypeScript. It provides a framework for creating web pages through a what-you-see-is-what-you-get interface, utilizing a responsive twelve-column grid engine for arranging elements via drag-and-drop manipulation. The system features a plugin-based architecture that allows for the integration of custom components. These components are managed through a schema-driven system that automatically generates data entry forms based on predefined property definitions, separating the rendering vie

Slap is a terminal-based text editor designed to mimic the user experience and interface of a graphical code editor within a command-line environment. It functions as both a text editor and a text-user interface file manager, providing a navigable sidebar for organizing and switching between files and directories. The editor is built for extensibility through a plugin system that allows the loading of external scripts and packages to add new features and core functionality. Users can customize the editor workflow by remapping keyboard shortcuts, adjusting performance parameters, and modifying

This project is a customizable browser text editor and a schema-driven document framework designed for building React-based WYSIWYG content editors. It replaces standard text areas with a system that represents content as a structured data tree rather than flat HTML, allowing for precise manipulation and validation of documents. The framework serves as an extensible content management interface and a TypeScript UI component library. It enables the development of specialized authoring tools through a plugin system and the use of strongly typed building blocks to ensure consistency across docum

Vis is a terminal-based modal text editor that utilizes vi keybindings and a system of structural regular expressions. It functions as a scriptable environment where Lua is used for configuration, custom key mappings, and plugin development. The editor distinguishes itself through a syntax highlighting system based on Parsing Expression Grammars and a pattern matching engine that treats text as a structure for complex search and replace operations. It also integrates directly with the system shell, allowing users to pipe text ranges to external commands and capture the resulting output. The

Helix is a terminal-based modal text editor designed for efficient code manipulation and navigation. It centers on a selection-first editing model, where operations are performed on active ranges rather than individual cursor positions, allowing for precise control over text and code structures. The editor distinguishes itself through deep integration with structural parsing and language intelligence. By utilizing an incremental parsing library, it builds concrete syntax trees that enable advanced features like structural code navigation, intelligent indentation, and syntax-aware text object

This repository ("Haystack Editor") is where we (Haystack Software) develop the Haystack Editor product together with the community. Not only do we work on code and issues here, we also publish our roadmap. This source code is available under the PolyForm Strict License 1.0.0…

LightTable is an extensible source code editor and integrated development environment designed as an interactive programming environment. It enables the evaluation of programming language fragments in real time to provide instant feedback on expressions. The workspace functions as a remote execution environment, connecting to and managing external servers to run code within remote processes. It allows for an interactive workflow where users can execute code fragments and track expression values without restarting the environment. The system provides source code editing capabilities, includin

Vim is a keyboard-driven text editor designed for the high-speed manipulation of source code and plain text files. It utilizes a modal interface that interprets keystrokes as either text insertion or complex navigation and editing commands. Built on a portable C core, the software maintains a consistent experience across diverse operating systems and terminal emulators through an abstraction layer that manages text in memory-mapped buffers. The editor functions as a highly modular platform that supports extensive customization through a built-in scripting engine and a plugin-based architectur

Micro is an extensible terminal text editor that supports mouse interaction and intuitive keyboard shortcuts for editing files in a command line environment. It functions as a multi-cursor editor with syntax highlighting and a plugin system for adding custom functionality and automation scripts. The editor distinguishes itself through simultaneous editing across multiple cursors and a script-based extension system. It enables the automation of repetitive editing tasks via macro recording and playback of keystroke sequences. The project covers workspace management through split-screen panes a

Notepad++ is a high-performance, lightweight source code editor designed for local development on Windows. Built as a native desktop application, it utilizes a specialized editing component to manage text buffers and render syntax highlighting for large files with minimal resource overhead. The editor distinguishes itself through a robust plugin architecture that allows users to extend core functionality by loading external binary modules at runtime. It also provides extensive support for custom language definitions, enabling users to map unique syntax rules and keywords to the rendering engi

Neovim is a text editing environment designed for extensibility and performance. It provides a core engine for text manipulation, multi-window management, and complex editing commands, while maintaining compatibility with existing paradigms. The project features a stable interface that allows external clients to interact with the application state, enabling the development of custom user interfaces and integrated tools. The architecture decouples the core editing logic from the user interface through an asynchronous protocol. This system supports external rendering processes, including termin

Emacs is an extensible real-time text editor that displays each character as it is typed across multiple windows and frames. It is fundamentally a scriptable editing environment, allowing users to write custom code that adds new commands or modifies behavior dynamically without restarting the editor. Beyond text editing, the editor includes an interactive help and manual browser that opens contextual documentation for any command or setting on demand, as well as a live configuration customization panel that applies adjustments to settings and themes instantly.

Atom is an extensible code IDE and hackable text editor designed for source code editing and the creation of custom development environments. It functions as a syntax highlighting editor and a version control integrated editor that tracks file changes and synchronizes code with remote repositories. The editor allows for the modification of its own core functionality and supports a package-based plugin system for creating custom themes and snippets. It also serves as a Markdown preview editor, providing side-by-side visual rendering for content authoring. The platform includes capabilities fo

Lapce is a high-performance text editor built with Rust that utilizes hardware acceleration for fast rendering and responsiveness. It functions as a modal text editor with Vim-style keybindings to minimize hand movement, an LSP client for language intelligence, and a remote development environment for editing files and executing code on distant servers. The editor features an extensible architecture based on the WebAssembly System Interface, allowing it to execute plugins compiled to WASI for cross-language functionality. It further distinguishes itself by implementing the Debug Adapter Proto

MarkEdit is a high-performance Markdown text editor and document navigator. It provides a scriptable editing environment that supports side-by-side HTML rendering for real-time formatting previews. The editor is distinguished by a multi-caret engine that enables rectangular block selections and simultaneous modification of multiple text ranges. It allows for extensive interface and functional customization through external CSS stylesheets and the integration of system-level scripts to automate repetitive tasks. The application includes tools for managing large documents, such as content bloc

Zed is an AI-native, high-performance code editor designed for extreme responsiveness and keyboard-centric workflows. It functions as an extensible text processing workspace that integrates autonomous agents and predictive models directly into the development environment to automate complex engineering tasks, refactoring, and code generation. The editor distinguishes itself through a GPU-accelerated rendering pipeline and an asynchronous multi-threaded architecture that ensures low-latency interaction even with large-scale projects. It features built-in support for real-time, multi-user colla

Lime is a multi-platform text editor designed for code and prose that supports simultaneous multi-point insertion for modifying text in several locations at once. It is a Python-scriptable environment that renders across desktop windows, web browsers, and terminal emulators. The editor is designed to be API-compatible with Sublime Text, enabling the execution of its plugins and the import of its configuration files, keybindings, and themes. This compatibility allows users to reuse third-party extensions and maintain a consistent experience when migrating from that environment. The project pr

Heynote is a markdown scratchpad editor and plain text note organizer that utilizes persistent, block-based buffers to maintain state across application sessions. It serves as a code snippet manager with automatic syntax highlighting and a tool for managing multiple categorized text buffers through a tabbed interface. The application functions as an interactive calculation notepad, evaluating mathematical expressions and currency conversions directly within the text. It also includes an image annotation utility that allows for freehand drawings and markups on embedded images, which can then b

Markor is an Android text editor that handles Markdown, todo.txt, and plain text files, functioning as a note-taking and task management tool. It operates directly on the device's filesystem, storing content as plain files without a proprietary database, and integrates with third-party sync tools like Syncthing for cross-device file synchronization. The editor provides syntax highlighting for multiple formats, a live preview that converts markup to HTML in real-time, and the ability to export documents as HTML or PDF. It also includes a file browser with a user-selectable root folder and supp