Open-source libraries, runtimes and developer tools in 2026
43 open-source projects, ranked by GitHub stars and how recently each was worked on. Transformers leads with 168k stars, ahead of Next.js. 42 had code pushed in the last three months. Most common licenses: MIT (23), See repository (13) and Apache-2.0 (5).
Open-source libraries, runtimes and developer tools
Frameworks and platforms to build on 21
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1
Transformers huggingface
🤗 Transformers: the model-definition framework for state-of-the-art machine learning models in text, vision, audio, and multimodal models, for both inference and training.
Framework or platform Production-ready You want to load, run or fine-tune open models from the Hugging Face Hub in Python.
★ 168k Apache-2.0 Python Active, pushed today -
2
Next.js vercel
The React Framework
Framework or platform Production-ready You build a React web app that needs SEO-friendly rendering and back-end routes in one project.
★ 143k MIT JavaScript Active, pushed today -
3
Electron electron
:electron: Build cross-platform desktop apps with JavaScript, HTML, and CSS
Framework or platform Production-ready You want one web codebase to ship desktop apps for Windows, macOS and Linux.
★ 124k MIT C++ Active, pushed today -
4
Tauri tauri-apps
Build smaller, faster, and more secure desktop and mobile applications with a web frontend.
Framework or platform Production-ready You want Electron-style apps with much smaller binaries and lower memory use.
★ 112k Apache-2.0 Rust Active, pushed today -
5
PyTorch pytorch
Tensors and Dynamic neural networks in Python with strong GPU acceleration
Framework or platform Production-ready You train or fine-tune neural networks.
★ 105k See repository Python Active, pushed today -
6
Tailwindcss tailwindlabs
A utility-first CSS framework for rapid UI development.
Framework or platform Production-ready You build UIs in a component framework and want consistent styling without writing custom CSS files.
★ 98k MIT TypeScript Active, pushed today -
7
Gin gin-gonic
Gin is a high-performance HTTP web framework written in Go. It provides a Martini-like API but with significantly better performance—up to 40 times faster—thanks to httprouter. Gin is designed for building REST APIs, web applications, and microservices.
Framework or platform Production-ready You build HTTP APIs in Go and want the most widely used framework with many examples.
★ 89k MIT Go Active, pushed 24 days ago -
8
Nest nestjs
A progressive Node.js framework for building efficient, scalable, and enterprise-grade server-side applications with TypeScript/JavaScript 🚀
Framework or platform Production-ready You build larger Node.js back ends and want Angular-style structure.
★ 77k MIT TypeScript Active, pushed today -
9
Astro withastro
The web framework for content-driven websites.
Framework or platform Production-ready You are building a blog, docs or marketing site and want static-first output with optional server rendering.
★ 64k See repository TypeScript Active, pushed today -
10
Nuxt nuxt
The full-stack Vue framework.
Framework or platform Production-ready Your team uses Vue and needs server rendering or a full-stack app.
★ 61k MIT TypeScript Active, pushed today -
11
Streamlit streamlit
Streamlit — A faster way to build and share data apps.
Framework or platform Production-ready Data scientists need to share an internal tool or demo quickly without front-end work.
★ 46k Apache-2.0 Python Active, pushed today -
12
Fiber gofiber
⚡️ Express inspired web framework written in Go
Framework or platform Production-ready You are moving from Express to Go and want a similar API.
★ 40k MIT Go Active, pushed today -
13
Fastify fastify
Fast and low overhead web framework, for Node.js
Framework or platform Production-ready You build Node.js APIs where performance and structured plugins matter.
★ 37k MIT JavaScript Active, pushed today -
14
Solid solidjs
A declarative, efficient, and flexible JavaScript library for building user interfaces.
Framework or platform Production-ready You want React-like syntax with top-tier runtime performance.
★ 36k MIT TypeScript Active, pushed today -
15
Koa koajs
Expressive middleware for node.js using ES2017 async functions
Framework or platform Production-ready You want a small, async-first HTTP layer and are happy to assemble the rest.
★ 36k MIT JavaScript Active, pushed today -
16
Remix remix-run
The fully-stacked web framework
Framework or platform Usable You want a web-standards-first framework and are willing to adopt a new major version early.
★ 33k MIT TypeScript Active, pushed today -
17
Symfony symfony
The Symfony PHP framework
Framework or platform Production-ready You build long-lived PHP applications and value explicit structure and long-term support releases.
★ 31k MIT PHP Active, pushed today -
18
Axum tokio-rs
HTTP routing and request-handling library for Rust that focuses on ergonomics and modularity
Framework or platform Production-ready You build HTTP APIs in Rust and want close integration with the Tokio ecosystem.
★ 28k MIT Rust Active, pushed today -
19
Actix Web actix
Actix Web is a powerful, pragmatic, and extremely fast web framework for Rust.
Framework or platform Production-ready You want a stable, high-performance Rust web framework past 1.0.
★ 25k Apache-2.0 Rust Active, pushed today -
20
Kit sveltejs
web development, streamlined
Framework or platform Production-ready You use Svelte and want a full app framework that deploys to Node, serverless or static hosting.
★ 21k MIT JavaScript Active, pushed today -
21
Sinatra sinatra
Classy web-development dressed in a DSL (official / canonical repo)
Framework or platform Production-ready You need a small Ruby web service or API where Rails would be overkill.
★ 12k MIT Ruby Slowing, pushed 4 months ago
Building blocks for your own system 21
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1
Three.js mrdoob
JavaScript 3D Library.
Building block Production-ready You need 3D graphics, product viewers or visualisations on the web.
★ 117k MIT JavaScript Active, pushed today -
2
Elasticsearch elastic
Free and Open Source, Distributed, RESTful Search Engine
Building block Production-ready You need full-text search or log analytics at scale and want Elastic's features and managed cloud.
★ 78k See repository Java Active, pushed today -
3
Redis redis
For developers, who are building real-time data-driven applications, Redis is the preferred, fastest, and most feature-rich cache, data structure server, and document and vector query engine.
Building block Production-ready You need very fast caching, counters, queues or pub/sub next to your main database.
★ 77k See repository C Active, pushed today -
4
Socket.IO socketio
Bidirectional and low-latency communication for every platform
Building block Production-ready You add chat, live updates or collaboration to a Node.js app.
★ 63k MIT TypeScript Active, pushed 34 days ago -
5
Meilisearch meilisearch
A lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications.
Building block Production-ready You want fast site or app search that is much simpler to run than Elasticsearch.
★ 60k See repository Rust Active, pushed today -
6
Pandas pandas-dev
Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more
Building block Production-ready You analyse spreadsheets, CSVs or database extracts in Python.
★ 50k BSD-3-Clause Python Active, pushed today -
7
GORM go-gorm
The fantastic ORM library for Golang, aims to be developer friendly
Building block Production-ready You want ORM-style database access in a Go application.
★ 40k MIT Go Active, pushed 10 days ago -
8
TypeORM typeorm
TypeScript & JavaScript ORM for Node.js — supports PostgreSQL, MySQL, MariaDB, SQLite, SQL Server, Oracle, and more.
Building block Production-ready You maintain a NestJS or TypeScript back end already built on it.
★ 37k MIT TypeScript Active, pushed 5 days ago -
9
Drizzle-orm drizzle-team
ORM
Building block Production-ready You want typed database access that stays close to SQL and works on serverless and edge runtimes.
★ 36k Apache-2.0 TypeScript Active, pushed today -
10
Tokio tokio-rs
A runtime for writing reliable asynchronous applications with Rust. Provides I/O, networking, scheduling, timers, ...
Building block Production-ready You write network services or async code in Rust.
★ 34k MIT Rust Active, pushed 2 days ago -
11
NumPy numpy
The fundamental package for scientific computing with Python.
Building block Production-ready You do any numerical, scientific or data work in Python.
★ 33k See repository Python Active, pushed today -
12
NGINX nginx
The official NGINX Open Source repository.
Building block Production-ready You need a fast, proven web server or reverse proxy in front of your applications.
★ 32k BSD-2-Clause C Active, pushed 4 days ago -
13
Pydantic pydantic
Data validation using Python type hints
Building block Production-ready You need to validate API inputs, config or LLM outputs into typed Python objects.
★ 29k MIT Python Active, pushed today -
14
Celery celery
Distributed Task Queue (development branch)
Building block Production-ready Your Python web app needs to run work in the background or on a schedule across workers.
★ 29k See repository Python Active, pushed today -
15
Mongo mongodb
The MongoDB Database
Building block Production-ready Your data is naturally document-shaped and changes structure often, or your team already knows MongoDB.
★ 29k See repository C++ Active, pushed today -
16
Postgres postgres
Mirror of the official PostgreSQL GIT repository. Note that this is just a *mirror* - we don't work with pull requests on github. To contribute, please see https://wiki.postgresql.org/wiki/Submitting_a_Patch
Building block Production-ready You need a general-purpose relational database for almost any application.
★ 23k See repository C Active, pushed today -
17
RabbitMQ Server rabbitmq
Open source RabbitMQ: core server and tier 1 (built-in) plugins
Building block Production-ready Your services need reliable asynchronous messaging with flexible routing.
★ 14k See repository JavaScript Active, pushed today -
18
Sidekiq sidekiq
Simple, efficient background processing for Ruby
Building block Production-ready Your Rails or Ruby app needs fast, reliable background jobs.
★ 14k See repository Ruby Active, pushed 3 days ago -
19
MySQL Server mysql
MySQL Server, the world's most popular open source database, and MySQL Cluster, a real-time, open source transactional database.
Building block Production-ready You run applications built for MySQL, such as many PHP stacks, or need its replication tooling.
★ 12k See repository C++ Active, pushed 6 days ago -
20
SQLAlchemy sqlalchemy
The Database Toolkit for Python
Building block Production-ready Your Python application needs serious relational database access outside Django.
★ 12k MIT Python Active, pushed today -
21
SQLite sqlite
Official Git mirror of the SQLite source tree
Building block Production-ready You need a reliable database inside an app, device or small server with no separate database process.
★ 11k See repository C Active, pushed today
Developer tools 1
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1
Vite vitejs
Next generation frontend tooling. It's fast!
Developer tool Production-ready You start or modernise a front-end project and want fast builds.
★ 84k MIT TypeScript Active, pushed today
Open-source licenses
- Permissive: 30. Use it anywhere, including in closed products. You keep the copyright notice; Apache-2.0 also grants patent rights.
Languages
TypeScript 10, Python 8, JavaScript 6, Rust 5, C 4, C++ 3, Go 3, Ruby 2, Java 1 and PHP 1.
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