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OpenCatalogcurated by FLOSSK

IDEs & Editors

From keyboard-first Neovim to VS Code’s extension ecosystem—choose by workflow and governance needs. Native stacks such as Notepad++, Geany, SciTE, Code::Blocks, Eclipse, and Apache NetBeans remain staples beside Electron-based editors.

Tools in this category (59)

Vim-fork editor with Lua config and strong LSP integration paths.

editorterminallsp

Community builds of VS Code OSS without Microsoft branding/telemetry defaults.

idelspextensions

Post-modern modal editor with built-in LSP, tree-sitter, and sensible defaults.

editorterminallspmodal
Honorable mention

Hackable Electron text editor with packages ecosystem (archived by GitHub).

editorelectron

Ubiquitous modal text editor and vi improved.

editorterminal

Terminal AI pair programmer that edits files in your git repo.

aicligit

Scintilla-based Windows editor with syntax highlighting, macros, and a large plugin ecosystem.

editorwindowstext

Modular Java-first IDE platform with marketplace plugins for dozens of languages and toolchains.

idejavaeclipse

Apache-licensed IDE with strong Java, PHP, and HTML5 tooling and Ant/Maven integration.

idejavaapache

Free C/C++/Fortran IDE built around wxWidgets with multiple compiler backends.

idecppwxwidgets
Honorable mention

GTK-based lightweight IDE/editor with build integration, symbol lists, and plugins.

editorgtklightweight
Honorable mention

Scintilla demo editor that became a favored lightweight coding surface with property files.

editorscintillalightweight
Honorable mention

MIT-licensed web-technology editor focused on HTML/CSS/JS with live preview roots.

editorwebhtml
Honorable mention

Self-hosted AI coding assistant

definitive-opensource
Honorable mention

⏩ Source-controlled AI checks, enforceable in CI. Powered by the open-source Continue CLI

definitive-opensource

Autonomous coding agent right in your IDE, capable of creating/editing files, executing commands, using the browser, and more with your permission every step of the way.

definitive-opensource
Honorable mention

an open source, extensible AI agent that goes beyond code suggestions - install, execute, edit, and test with any LLM

definitive-opensourcecli-plus

🌟 The Multi-Agent Framework: First AI Software Company, Towards Natural Language Programming

definitive-opensource
Honorable mention

Roo Code gives you a whole dev team of AI agents in your code editor.

definitive-opensource
Honorable mention

Open source AI coding agent. Designed for large projects and real world tasks.

definitive-opensourcecli

Code at the speed of thought – Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.

definitive-opensourcecorporate-influence
Honorable mention

Lightning-fast and Powerful Code Editor written in Rust

definitive-opensource
Honorable mention

Blazing fast Neovim framework providing solid defaults and a beautiful UI, enhancing your neovim experience.

definitive-opensourcecli
Honorable mention

📝 CodeEdit App for macOS – Elevate your code editing experience. Open source, free forever.

definitive-opensource
Honorable mention

Void is the open-source Cursor alternative.

definitive-opensource
Honorable mention

Debug Adapter Protocol client implementation for Neovim

definitive-opensource
Honorable mention

Fast as FUCK nvim completion. SQLite, concurrent scheduler, hundreds of hours of optimization.

definitive-opensource
Honorable mention

Modernity meets insane extensibility. The future of organizing your life in Neovim.

definitive-opensource

Quill is a modern WYSIWYG editor built for compatibility and extensibility

definitive-opensource
Honorable mention

A modern and intuitive terminal-based text editor

definitive-opensourcecli
Honorable mention

A modern, lightweight text editor with a minimalist design.

definitive-opensource
Honorable mention

mawww's experiment for a better code editor

definitive-opensourcecli
Honorable mention

A lightweight text editor written in Lua

definitive-opensource

Lightweight coding agent that runs in your terminal

definitive-opensourceclimanual

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

definitive-opensource
Honorable mention

Portable package manager for Neovim that runs everywhere Neovim runs. Easily install and manage LSP servers, DAP servers, linters, and formatters.

definitive-opensourcetui
Honorable mention

The Cursor for Designers • An Open-Source AI-First Design tool • Visually build, style, and edit your React App with AI

definitive-opensource
Honorable mention

Cross-platform text editor, written in Free Pascal

definitive-opensource
Honorable mention

A complete text editor for your terminal.

definitive-opensourcetui
Honorable mention

Text editor - Notes & ToDo (for Android) - Markdown, todo.txt, plaintext, math, ..

definitive-opensource
Honorable mention

novelWriter is an open source plain text editor designed for writing novels.

definitive-opensource
Honorable mention

TeXstudio is a fully featured LaTeX editor. Our goal is to make writing LaTeX documents as easy and comfortable as possible.

definitive-opensource
Honorable mention

Terminal based IDE & text editor: easy, powerful and fast

definitive-opensourcetui
Honorable mention

A modern, cross platform IDE for .NET, built with .NET & Godot

definitive-opensource