Open-source alternatives to Notepad Plus Plus

TextMate is a programmable text editor designed for software development and project management. It functions as a highly customizable environment where users can define language-specific behaviors, syntax highlighting rules, and automated workflows to suit their individual development needs. The editor distinguishes itself through a modular, bundle-based extensibility model that allows for deep integration with system shell commands. By piping document buffers through external scripts and command-line tools, users can perform complex text transformations, automate file lifecycle tasks, and b

Payload is a headless content management system and application framework that uses a code-first approach to define data schemas and administrative interfaces. By utilizing a centralized, type-safe configuration object, it automatically generates database schemas, API endpoints, and a fully customizable admin panel. The system is built on a database-agnostic architecture, allowing it to interface with various storage engines while providing a unified, type-safe API for server-side operations, REST, and GraphQL. What distinguishes Payload is its deep extensibility and developer-centric design.

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

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

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.

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.

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

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

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

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

Editor.js is a block-style rich text editor that organizes document content into an ordered array of independent, modular data objects. By replacing monolithic HTML strings with a structured, machine-readable JSON format, it decouples the content creation process from the final presentation layer. The editor functions as a browser-based orchestration layer that manages user input, focus, and state synchronization across individual blocks. Its architecture is built on a plugin-driven system where external modules register themselves to handle specific content types, providing custom rendering

GrapesJS is a modular, web-based visual editor framework designed for building drag-and-drop page builders and custom content management interfaces. It functions as a structural engine that manages hierarchical document models, allowing developers to create reusable design blocks and complex page compositions. By providing a schema-driven approach to UI configuration, the framework enables the construction of design environments where users can assemble layouts and manage component properties visually without writing raw code. The project distinguishes itself through a highly extensible, plug

Vault is a centralized secrets management platform designed to secure, store, and control access to sensitive credentials such as API keys, passwords, certificates, and encryption keys. At its core, the system employs a barrier-based cryptographic sealing mechanism that requires an unseal process to decrypt internal storage, ensuring that sensitive data remains protected. It provides identity-based access control to manage granular permissions across distributed infrastructure, effectively centralizing security policies and authentication for both human and machine workloads. What distinguish

This project is a static analysis engine designed to identify patterns, enforce coding standards, and automate code quality improvements in software projects. By parsing source code into structured abstract syntax trees, it enables deep programmatic inspection and the automated remediation of identified programming issues. The engine functions as a pluggable linting framework, allowing developers to extend its core capabilities through a modular architecture. Users can inject custom rules, parsers, and processors to support non-standard file formats or domain-specific logic. This extensibilit

Micro is a terminal-based text editor designed for use within command-line interfaces. It provides a keyboard-centric environment for creating and modifying source code and configuration files without requiring a graphical desktop system. The editor features a modular architecture centered on a plugin-driven system and an embedded scripting engine. Users can extend core functionality, automate workflows, and customize editor behavior by writing scripts or installing external extensions through a centralized package management system. This extensibility allows for the integration of custom com

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

A fast and lightweight IDE

MacVim is a native graphical interface for the Vim text editor tailored for the macOS desktop environment. It is a modal, keyboard-driven editor that wraps a command-line core within a native Cocoa-based GUI wrapper, providing system menus, toolbars, and scroll bars. The editor is highly scriptable, utilizing a built-in scripting language and external interpreters for Python, Ruby, and Perl to automate complex text workflows. It further extends functionality by connecting to third-party applications through asynchronous jobs and communication channels. The project includes capabilities for s

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…

Sublime Text essential plugins and resources

Vim-galore is a comprehensive technical reference and curated guide for mastering the Vim text editor. It serves as a central resource for users seeking to understand the philosophy, command structure, and advanced customization capabilities required to operate professional-grade modal text editors effectively. The project distinguishes itself by providing a deep dive into efficient editing workflows, plugin management, and automation strategies within a terminal-based environment. It covers the full spectrum of editor mastery, from fundamental modal navigation and text manipulation to comple

CotEditor is a native macOS plain text editor designed for lightweight file modification and developer use. It is a desktop application built specifically for the macOS operating system to ensure high performance and system integration. The project functions as a text encoding manager, providing the ability to process and convert a wide range of plain text formats and legacy character encodings to prevent corruption and display errors. Its capabilities cover plain text editing, lightweight code editing for scripts and configuration files, and general macOS text processing.

The IntelliJ Platform is a modular framework designed for building desktop integrated development environments. It provides the core infrastructure necessary to create specialized coding tools, including a virtual file system for tracking project sources, a text editor, and a cross-platform graphical user interface framework. The platform distinguishes itself through a component-based architecture that allows developers to extend core application behavior via independent functional units. It supports the creation of custom development environments by integrating language analysis logic, enabl

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

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