Open-source alternatives to SubEthaEdit

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

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

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

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

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.

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

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

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

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

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…

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.

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

Awesome Emacs is a curated directory of community-driven resources, packages, and configurations designed to extend the functionality of the Emacs text editor. It serves as a comprehensive index for users seeking to transform their editor into a specialized development environment or a highly personalized productivity workspace. The collection highlights tools that enable deep customization of the Emacs experience, ranging from ergonomic key binding schemes and visual interface themes to advanced window management and navigation utilities. It provides a centralized reference for discovering e

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

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

Vim-lsp-settings is a Vim plugin that automates the installation, configuration, and lifecycle management of external language server binaries. It functions as a development environment manager, bridging the gap between the text editor and language-specific analysis tools to provide code intelligence features such as autocompletion and error checking. The plugin distinguishes itself by orchestrating the entire toolchain, including the automated downloading and versioning of language server executables. It employs project-root heuristic detection to identify workspace boundaries, ensuring that

This repo contains chapters which explains how one can build a minimal express library.

Semaphore is a web interface and API for running and scheduling Ansible playbooks and other infrastructure automation tools. It serves as an infrastructure automation dashboard and DevOps task scheduler for orchestrating deployments. The platform functions as a multi-tool automation hub, providing a centralized dashboard for managing infrastructure as code using Ansible, Terraform, OpenTofu, and Terragrunt. It includes an inventory management tool for organizing target servers and containers, alongside a secret management service for storing sensitive environment variables required during exe

Brackets is an extensible JavaScript IDE and front-end code editor specifically designed for authoring HTML, CSS, and JavaScript. It serves as a web development text editor that provides a specialized environment for building websites. The editor is distinguished by its live preview capabilities, which render code changes in a browser in real time for immediate visual feedback. It further supports front-end workflows through inline style editing and the ability to synchronize code changes across multiple browser windows for cross-browser testing. The project includes a wide range of developm

Noto is a beautiful and simple plain text editor for macOS written in Swift.

Pascal formatter extension for Visual Studio Code

AutoHotFlow - Simply draw your applictaions

This project is a command-line task runner designed to manage project-specific workflows through a centralized, configuration-driven interface. It functions as a declarative tool for organizing build logic, environment variables, and task dependencies into a structured format, enabling the automation of complex development pipelines. The tool distinguishes itself by providing a shell-agnostic execution layer that ensures consistent behavior across Windows, macOS, and Linux. It supports advanced workflow orchestration by constructing directed acyclic graphs to manage task prerequisites, while

Intellij IDEA Object Pascal plugin

The dip is a CLI dev–tool that provides native-like interaction with a Dockerized application.