Atheos

A web‑based IDE framework that builds on the Codiad codebase, offering a lightweight, self‑hostable development environment with only Apache2, PHP 7+ (or PHP 5.4) and basic file permissions required. It runs in modern browsers without a database, providing a three‑panel layout for file navigation, split‑screen editing, and hidden controls. The editor supports syntax highlighting for over 40 languages, smart auto‑completion, error notifications, and advanced search, while a plugin library and marketplace allow further extension.

Real‑time collaborative editing lets multiple users work on the same project, and the interface includes features such as editor screen splitting, local‑storage redundancy, and a selection of syntax‑color themes. Internationalization support and i18n are built in, and the source code is fully open‑source under the MIT license, enabling customization and deployment on any server.

The project is maintained by a dedicated team of contributors who provide regular updates and bug fixes. It is offered as a free tier with no subscription model, targeting developers who need a fast, low‑overhead cloud IDE that can be run on modest server resources.