Backend GitHub Repositories (2026) · Open Source Tools

Open-source Back-end, self-hostable & ready to use - Real-time, storage, advanced search - Web, Apps, Mobile, IoT -

A lean, modular web server for rapid full-stack development.

the browser-facing portion of osu!

:blue_book: Trezor address/account balance backend

Multitenant backend server for building web and mobile apps rapidly. The backend for busy developers. (self-hosted or hosted)

graph based intermediate representation and backend for optimising compilers

Prod Forge is an open-source reference that shows how to build and operate a production-ready system: AI-assisted development, quality gates, CI/CD, infrastructure, observability, migrations, and rollback.

Modern admin interface for FastAPI with built-in authentication, event tracking, and security features

💎 Ruby on Rails agent for Forest Admin to integrate directly to your existing Ruby on Rails backend application.

Supabase-compatible backend in a single binary — real Postgres with RLS, no Docker. Works with supabase-js unchanged.

Servercn , the backend component registry for Node.js inspired by shadcn/ui. The shadcn philosophy for Node.js backend.

Modular framework for creating selective indexers and featureful backends for dapps

DevTools and runtime environment for the Elm programming language

FlexMeasures is an enterprise-ready & customizable energy optimization engine, for scheduling and forecasting for flexible assets in real-time operations.

A drop-in replacement for native enum. Like native enum, but much better!

🌱 Express/Sequelize agent for Forest Admin to integrate directly to your existing Express/Sequelize backend application.

A comprehensive security repo for modern Java backend applications. The only identity provider you’ll ever need.

Explore the vintage look!

A TYPO3 extension that integrates the Apache Solr search server with TYPO3 CMS. dkd Internet Service GmbH is developing the extension. Community contributions are welcome. See CONTRIBUTING.md for details.

Backend.AI Web UI for web / desktop app (Windows/Linux/macOS). Backend.AI Web UI provides a convenient environment for users, while allowing various commands to be executed without CLI. It also provides some visual features that are not provided by the CLI, such as dashboards and statistics.