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AddOpen Network Linux (ONL) is an open-source, foundational platform software layer for next-generation, modular NOS architecture on open networking hardware.
ONNX is an open format built to represent machine learning models. ONNX defines a common set of operators - the building blocks of machine learning and deep learning models - and a common file format to enable AI developers to use models with a variety of frameworks, tools, runtimes, and compilers.
OpenNext takes the Next.js build output and converts it into packages that can be deployed across a variety of environments. Natively OpenNext has support for AWS Lambda, and classic Node.js Server.
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Take Control of Your Learning. Privately.
A powerful open-source, AI-powered note-taking/research platform that respects your privacy. An Open Source implementation of Notebook LM with more flexibility and features.
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🍴 OpenNutriTracker is a free and open source calorie tracker with a focus on simplicity and privacy.
OpenNutriTracker logs what you eat and drink against a calorie and macro target it works out from your height, weight, age, and activity level, and keeps the record on your phone. It is for anyone who wants the numbers without handing their eating history to a company, whether that is losing weight, gaining it, managing a condition, or simply knowing.
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A meeting note-taker that talks back.
OpenOats sits next to your call, transcribes both sides of the conversation in real time, and searches your own notes to surface things worth saying — right when you need them.
Open Source Observability Platform for Logs, Metrics, Traces, and More – Your Ultimate Dashboard for Alerts and Insights.
OpenObserve is a cloud native observability platform built specifically for logs, metrics, traces and analytics designed to work at petabyte scale.
Self-hostable instant messaging server compatible with classic AIM and ICQ clients written in golang. (Independently developed, not affiliated with or endorsed by AOL)
An open-source framework for provably private AI inference.
OpenPCC is an open-source framework for provably private AI inference, inspired by Apple’s Private Cloud Compute but fully open, auditable, and deployable on your own infrastructure. It allows anyone to run open or custom AI models without exposing prompts, outputs, or logs - enforcing privacy with encrypted streaming, hardware attestation, and unlinkable requests.
AI-Native Open-Source Design Tool.
The world's first open-source AI-native vector design tool and the first to feature concurrent Agent Teams. Design-as-Code. Turn prompts into UI directly on the live canvas. A modern alternative to Pencil.
Open-Source Design Editor.
Opens Figma files. Built-in AI. Fully programmable. Also a toolkit for building custom editors.
OpenPERouter (Provider Edge Router) meant to run on linux and to interact with the host through veths.
OpenPERouter is an open implementation of a Provider Edge (PE) router, designed to terminate multiple VPN protocols on Kubernetes nodes and expose a BGP interface to the host network.
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Timely. Accurate. Relevant Phishing Intelligence.
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openpilot is an open source driving agent.
openpilot is an operating system for robotics. Currently, it upgrades the driver assistance system on 275+ supported cars.
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LLM playground to experiment with local models and build fine-tuning datasets and benchmarks.
A playground that gives you full control over the contents of a chat conversation: add, remove and edit messages (system, user and assistant) and shape the flow of the conversation to be exactly what you need.
openPLM opens the way and offers a secure, open and flexible solution for product data structure and management purpose for all business areas, for all business process, for all expected functions, for all applications (open source or proprietary).
A new API for podcast synchronization.
The Open Podcast API is an initiative aiming to provide a feature-complete synchronization API specification for podcast (web) apps and user-focused servers.
OpenPoke is a simplified, open-source take on Interaction Company’s Poke assistant—built to show how a multi-agent orchestration stack can feel genuinely useful. It keeps the handful of things Poke is great at (email triage, reminders, and persistent agents) while staying easy to spin up locally.
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Policy-based control for cloud native environments. Flexible, fine-grained control for administrators across the stack.
Open Policy Agent (OPA) is an open source, general-purpose policy engine that enables unified, context-aware policy enforcement across the entire stack.
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- Guardrails for Your Cloud: A Simple Guide to OPA and Terraform @ Sami Banerjee's Medium.
- Getting Open Policy Agent Up and Running @ The New Stack.
- Simplify Kubernetes Security With Kyverno and OPA Gatekeeper @ The New Stack.
- Automating policy enforcements for infrastructure using Open Policy Agent (OPA) in Terraform — Part 1 @ Ashay Maheshwari's Medium.
- Terraform governing with OPA @ DevOpsOnTheTrail.
- Blueprinting Security in CI/CD: Building Trust Through Open Source @ CD Foundation.
- From Kubernetes Gatekeeper to Full-Stack Governance with OPA @ Pulumi.
- Governing infrastructure as code using pattern-based policy as code @ AWS Security Blog.
Nagios or Icinga Web interface based on NDO. It allows you to view almost everything about Nagios or Icinga in a single page: alert, ack, downtime, comment. You can also interact with Nagios or Icinga through ack, downtime, comment, disable, and reset buttons. You can filter on hosts and services states (critical, warning, unknown, ok, outage...). The status popin allows to display graphs, either the ones from Nagios (trends.cgi) or custom ones based on RRD (pnp4nagios, ...).
OpenPrinter is a repairable, compact, and robust printer designed to last.
Fully repairable and equipped with a refillable ink system, it adapts to your needs while reducing your printing costs.
Easy to maintain, it offers a sustainable, economical, and eco-friendly alternative to traditional printers.
Open Products Facts is a general products (BUT NOT food, cosmetics or pet food) database made by everyone, for everyone. You can use it to make better and more circular choices about products, and as it is open data, anyone can re-use it for any purpose.
sub-atomic styles. Supercharged CSS variables. Expertly crafted web design tokens. Create consistent components. Useful in any framework.
CSS custom properties to help accelerate adaptive and consistent design.
Reference implementation of OpenPubkey.
OpenPubkey adds user generated cryptographic signatures to OpenID Connect (OIDC) to enable users to sign messages or artifacts under their OpenID identity. Verifiers can check that these signatures are valid and associated with the signing OpenID identity. OpenPubkey does not add any new trusted parties beyond what is required for OpenID Connect and is fully compatible with existing OpenID Providers (Google, Azure/Microsoft, Okta, OneLogin, Keycloak) without any changes to the OpenID Provider.
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OpenPubkey is an open source project that binds public keys and workload identities using standard SSO and OpenID Connect.
Use OpenPubkey today to SSH to machines on your network without SSH keys.
openpyxl is a Python library to read/write Excel 2010 xlsx/xlsm/xltx/xltm files.
It was born from lack of existing library to read/write natively from Python the Office Open XML format.
All kudos to the PHPExcel team as openpyxl was initially based on PHPExcel.
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OpenRAG is a comprehensive, single package Retrieval-Augmented Generation platform built on Langflow, Docling, and Opensearch.
Users can upload, process, and query documents through a chat interface backed by large language models and semantic search capabilities. The system utilizes Langflow for document ingestion, retrieval workflows, and intelligent nudges, providing a seamless RAG experience.
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The OpenRail Association creates an open, autonomous and collaborative innovation space. Its mission is to promote the development of Open Source software projects in the railway sector, as it already exists in numerous other industrial sectors like telecommunication, automotive, or energy.
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Open RAN is intelligent Radio Access Network(RAN) integrated with general purpose platforms with open interface between software definced funtions. Open RAN ecosystem enables enormous flexibility and interoperability with a complete openess to multi-vendor deployments. Open RAN architecture is designed for building virtualized RAN with AI powered control, which is the key to tame the 5G/6G complexity.
RDAP command line client. OpenRDAP is a command line client for the Registration Data Access Protocol, written in Go.
RDAP is a replacement for WHOIS, which provides domain name & IP address registration information in JSON format over HTTP.
A free React landing page template designed to showcase open source projects, SaaS products, online services, and more. Open is a free React landing page template built with Tailwind CSS for developers/makers who want to create a quick and professional landing page for their open source projects, SaaS products, online services, and more.
OpenRefine (formerly Google Refine) is a powerful tool for working with messy data: cleaning it; transforming it from one format into another; extending it with web services; and linking it to databases like Freebase.
OpenRegex is a simple, self-hosted, web-based regular expression (regex) tester and debugger.
Open-Source Session Replay & Analytics. Session replay you can self-host. All you need to observe, measure and iterate on your product.
Session replay and product analytics you can self-host. Ideal for reproducing issues, co-browsing with users and optimizing your product.
Free WebRTC TURN Server. Open Relay is a free TURN server provided by Metered Video that you can use in your WebRTC applications. The Open Relay TURN server is highly available, reliable and offers both STUN and TURN Capabilities.
Autoresearch on your machine
Start the local dashboard, then give each research direction its own agent. They work in parallel, in isolated worktrees, using your existing tools and compute.
To spin up remote compute while doing Autoresearch, use OpenResearch's compute marketplace, which aggregates offerings from multiple providers.
OpenResearcher: A Fully Open Pipeline for Long-Horizon Deep Research Trajectory Synthesis.
OpenResearcher is a fully open agentic large language model (30B-A3B) designed for long-horizon deep research scenarios. It achieves an impressive 54.8% accuracy on BrowseComp-Plus, surpassing performance of GPT-4.1, Claude-Opus-4, Gemini-2.5-Pro, DeepSeek-R1 and Tongyi-DeepResearch. We fully open-source the training and evaluation recipe—including data, model, training methodology, and evaluation framework for everyone to progress deep research.
Open Research Europe is an open access publishing venue for European Commission-funded researchers across all disciplines, with no author fees.
Accelerate the impact of your research with rapid publication, open peer review, and indexing in databases such as Scopus and PubMed.
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Open Responses is an open-source specification and ecosystem for building multi-provider, interoperable LLM interfaces based on the OpenAI Responses API. It defines a shared schema, and tooling layer that enable a unified experience for calling language models, streaming results, and composing agentic workflows—independent of provider.
High Performance Web Platform Based on Nginx and LuaJIT.
OpenResty® is a dynamic web platform based on NGINX and LuaJIT.
OpenResty® is a full-fledged web platform that integrates our enhanced version of the Nginx core, our enhanced version of LuaJIT, many carefully written Lua libraries, lots of high quality 3rd-party Nginx modules, and most of their external dependencies. It is designed to help developers easily build scalable web applications, web services, and dynamic web gateways.
An open-source, self-hosted AI code review bot. Deploy to Vercel, connect a GitHub App, and get on-demand PR reviews powered by Claude.
Large Scale Automated Refactoring.
OpenRewrite is an open-source automated refactoring ecosystem for source code, enabling developers to effectively eliminate technical debt within their repositories.
It consists of an auto-refactoring engine that runs prepackaged, open-source refactoring recipes for common framework migrations, security fixes, and stylistic consistency tasks – reducing your coding effort from hours or days to minutes. Build tool plugins like the OpenRewrite Gradle plugin and the OpenRewrite Maven plugin help you run these recipes on one repository at a time.
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Open source RGB lighting control that doesn't depend on manufacturer software.
What if there was a way to control all of your RGB devices from a single app, on both Windows and Linux, without any nonsense? That is what OpenRGB sets out to achieve. One app to rule them all.
Open platforms for robotics
We create open software and hardware platforms for robotics. Working with our global community, we offer three open platforms: ROS, Gazebo and Open-RMF. Program your robots with ROS, simulate them with Gazebo, interoperate your systems using Open-RMF. These platforms are widely used around the world, from production deployments to classroom projects. To learn more about how the community is using these platforms to create valuable solutions, see our community showcase.
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Everything you need to design, simulate and fly better rockets
OpenRocket is a free, fully featured model rocket simulator that allows you to design and simulate your rockets before building and flying them.
A unified interface for LLMs. Better prices, better uptime, no subscription.
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Openrouteservice is a open source route planner with plenty of features for car, heavy vehicles, hiking, cycling and wheelchair.
This application implements a map client for the openrouteservice API as Single Page Application (SPA). It is a base application that can be used for multiple purposes, customized via configurations and extended via plug-ins.
A free, cross-platform alternative to Microsoft’s RSAT.
OpenRSAT is a free and open source solution that allows system administrators to manage an Active Directory (AD) environment directly from any operating system: Windows, macOS, and Linux.
Designed as a lightweight alternative to Microsoft’s RSAT (Remote Server Administration Tools), OpenRSAT offers a modern, cross-platform graphical interface. It enables system administrators to manage users, groups, and organizational units on Windows, Linux, and macOS.
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OpenRsync is a FREE, easy to use implementation of the rsync program.
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The free SaaS template with superpowers
A free, open-source SaaS app starter for React & Node.js with superpowers. Production-ready. Community-driven.
Universal Sandbox Infrastructure for AI Applications.
Securely run commands, filesystems, code interpreters, browsers, and developer tools in isolated runtime environments.
OpenSandbox is a general-purpose sandbox platform for AI applications, offering multi-language SDKs, unified sandbox APIs, and Docker/Kubernetes runtimes for scenarios like Coding Agents, GUI Agents, Agent Evaluation, AI Code Execution, and RL Training.
OpenScales is an open source (LGPL) mapping framework written in ActionScript 3 and Flex that enables developers to build Rich Internet Mapping Applications.
NIST Certified SCAP 1.2 toolkit. The oscap program is a command line tool that allows users to load, scan, validate, edit, and export SCAP documents.
The OpenSCAP ecosystem provides multiple tools to assist administrators and auditors with assessment, measurement and enforcement of security baselines. We maintain great flexibility and interoperability, reducing costs of performing security audits.
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The OpenSceneGraph is an open source high performance 3D graphics toolkit, used by application developers in fields such as visual simulation, games, virtual reality, scientific visualization and modelling. Written entirely in Standard C++ and OpenGL it runs on all Windows platforms, OSX, GNU/Linux, IRIX, Solaris, HP-Ux, AIX and FreeBSD operating systems. The OpenSceneGraph is now well established as the world leading scene graph technology, used widely in the vis-sim, space, scientific, oil-gas, games and virtual reality industries.
Showcase your next product demo with Open Screen. Professional screen recordings with zoom effects, annotations, and beautiful backgrounds.
A free, open-source screen recorder and video editor Native capture, local AI, no paywall.
Record your screen, ship a demo. Free and open-source, GPU-accelerated, no watermarks, no subscriptions. Windows, macOS, Linux. Actively maintained.
Create stunning demos for free. Open-source, no subscriptions, no watermarks, and free for commercial use. An alternative to Screen Studio.
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Discover, collect, and sell extraordinary NFTs OpenSea is the world's first and largest NFT marketplace
🔎 Open source distributed and RESTful search engine. OpenSearch makes it easy to ingest, search, visualize, and analyze your data.
OpenSearch is a community-driven, open source fork of Elasticsearch and Kibana following the license change in early 2021. We're looking to sustain (and evolve!) a search and analytics suite for the multitude of businesses who are dependent on the rights granted by the original, Apache v2.0 License.
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