nsupdate.info
nsupdate.info is a free dynamic DNS service and free and open-source software. It is written in Python and Django, and the site states it will not display ads or spam.
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ntsc.rs
ntsc-rs is a free, open-source video effect that emulates analog TV and VHS artifacts. It is written in Rust and is available as a web app, a standalone application, and as a plugin for After Effects, Premiere, and OpenFX-compatible software.
github.com
Nuvio provides software and setup resources for accessing or managing video streams.
nyrna.merritt.codes
Nyrna is open-source software that suspends and resumes games and other applications, similar to console suspend modes. It can be triggered by hotkey, a Material GUI, or a CLI, and can pause games that cannot normally be paused while freeing CPU and GPU resources. The site warns that modifying running applications may cause crashes.
github.com
Nyrna is a utility that suspends games and applications, similar to the suspend function on consoles. It can pause games that cannot normally be paused and suspend other tasks such as 3D renders, video encoding and software compilation. It works on Linux with X11 and Microsoft Windows.
octobox.io
Octobox is a notification manager for GitHub. It adds an archived state to notifications so they can be marked done, and moves archived threads back into the inbox when activity occurs. Notifications can be searched and filtered by repository, organisation, type, action, state, CI status and reason. Octobox is free for open source projects, with paid private repository access available by donation or through the GitHub Marketplace.
odoo.com
Odoo offers a free, open-source website builder and CMS. The AI-powered configurator creates a website through steps including setting business type, selecting a color palette, uploading a logo and picking a theme. Pages are built with drag-and-drop blocks, and features include mobile responsiveness, translation, SEO tools and analytics.
omniroute.online
OmniRoute by Cheaper Inference is an open-source AI router that routes requests across providers through one OpenAI-compatible endpoint, with automatic fallback. It accepts OpenAI, Claude, Gemini and Responses API requests at /v1 and ships as a self-hosted gateway with a local dashboard. The catalog covers chat, media, search, local runtimes and cloud agents.
opencolorio.org
OpenColorIO is an open-source color management solution geared towards motion picture production, with an emphasis on visual effects and computer animation. OCIO is integrated and ready to use in many major software packages.
openfoam.org
OpenFOAM is free, open source computational fluid dynamics software written in C++, owned by the OpenFOAM Foundation and distributed under the General Public Licence. It calculates fluid motion and forces, heat transfer, thermodynamics and chemistry in fluids and solids. It is produced by the core maintenance team at CFD Direct and is used in industry, government research and academia.
openhab.org
openHAB is a vendor- and technology-agnostic open source automation software for the home, developed in Java on Apache Karaf. Its pluggable architecture supports over 400 technologies and thousands of devices, with rules driven by time, events, scripts, actions, notifications and voice control. It runs on Linux, macOS, Windows, Raspberry Pi, Docker and Synology, and is accessed through web, iOS and Android apps. It runs on local hardware without requiring cloud services.
github.com
OpenRabbit is a free, open-source, self-hosted GitHub pull request reviewer. It analyzes PR diffs, consults a pluggable LLM provider such as Groq or OpenRouter, and posts a summary with inline comments. It runs entirely in GitHub Actions, so no server or hosting subscription is required, and code stays in the user's runner.
github.com
Continue is an open source coding agent. It is hosted on the GitHub repository continuedev/continue, which includes project documentation and notes a final 2.0.0 release. Contributors can engage with the project by creating a GitHub account.
github.com
Kilo - Open-source AI coding assistant for VS Code, JetBrains, and the CLI.
github.com
Model Context Protocol - An open standard for connecting AI models to external tools and data sources. MCP Registry.
github.com
Vanna is an open source tool that enables users to interact with SQL databases via natural language. It uses large language models and agentic retrieval to generate accurate text-to-SQL queries.
opentoonz.github.io
OpenToonz is open-source 2D animation production software based on Toonz, developed by Digital Video S.p.A. in Italy and customized by Studio Ghibli. Dwango launched the OpenToonz project with Digital Video and Studio Ghibli. It can be used free of charge for commercial and non-commercial projects.
opentracksapp.com
OpenTracks is an open-source sport tracking application described as completely respecting privacy. Its features include elevation gain estimates, Bluetooth LE heart rate sensors, photos and markers during tracking, online and offline maps, and map theming. A pure offline version without internet permission is available via F-Droid. The app contains no in-app analytics and no cloud integration.
optuna.org
Optuna is an open source automatic hyperparameter optimization software framework designed for machine learning. It provides an imperative, define-by-run style user API with eager search spaces, algorithms that prune unpromising trials, and parallelization of searches over multiple threads or processes without modifying code. It is framework agnostic and can be installed with pip on Python 3.10 or newer.
owncast.online
Owncast is a free and open source live video and web chat server that works with existing broadcasting software. Users point their live stream at an Owncast server they control. It includes built-in chat with moderation tools and custom emotes, custom branding and domain options, notifications, and fediverse support. It runs on the user's own server with standard streaming protocols.
pa11y.org
Pa11y is a set of free and open source tools for automated accessibility testing of web pages. The command-line interface loads pages and highlights accessibility issues, while Pa11y Dashboard tests pages daily and graphs improvements and regressions. Pa11y Webservice is the JSON-based webservice behind the dashboard, and Pa11y CI iterates over a list of pages for use in CI.
The Pacific Northwest National Laboratory DataHub is a searchable repository of scientific data and publications. The site offers filtering by category, content type and tags across topics such as biology, earth system science and computing. Listed content types include publications, datasets, people, projects, data sources, institutions and software.
github.com
Packages provides software and setup resources for accessing or managing video streams.
paint-database.org
PAINT is a database making operational data of concentrating solar power plants available under FAIR data principles: findable, accessible, interoperable, and reusable. Its current data covers calibration images, deflectometry measurements, kinematics settings, and weather information from the solar tower plant in Jülich, Germany. Metadata follows the STAC standard, and software for data processing is publicly available in the project's source code repository.