Ogmo Editor 3 is a free, open source, project oriented level editor made for indie game developers by indie game developers. It offers a project based workflow, layer types for tiles, decals, entities and grids, and saves levels to JSON files. It is free to use for personal and commercial projects and is open sourced under the MIT license.
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Oh My Posh is a prompt engine for shells, with one configuration intended to work across PowerShell, Bash, Zsh, Fish, Nu and others on Windows, macOS, Linux, WSL, containers and SSH. It is written in Go, and its segments run concurrently and cache results so prompts render in milliseconds. Around 120 segments cover git status, cloud context, language versions and system metrics.
Omni Route is a GitHub repository or organization with source code, releases, documentation, or project resources.
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.
Ondoku is text-to-speech software that reads text up to 5,000 characters free of charge and offers paid plans converting up to 1 million characters a month. Generated audio can be saved as MP3 files and used commercially. It runs in a browser on PC or smartphone without installation.
one sec is a screen time management application that uses scientifically backed methods to help users reduce their screen time. It can limit social media use, block websites and apps, and interrupt scrolling habits to break the cycle of social media dopamine hits. The application’s approach has been studied in partnership with the Max Planck Institute and Heidelberg University.
OneCompiler is an online code editor and compiler for writing, running and sharing code in the browser. It supports coding agents, embeddable editor and challenge widgets, and APIs for code execution in 110+ languages.
Onelang is a browser-based IDE for cross-language editing, exposed through a web interface. The page notes that unsupported browsers may not work and recommends the latest Chrome or Firefox. It offers demos covering generic features, reflection, inheritance, big integers, JSON handling and Hello world, and states that the compiler backend requires authentication.
OneLinePlayer is a free web video player for Vimeo and Dropbox videos. It uses a direct link to a video file and offers preview images, player style adjustments, and controls such as autoplay, loop and mute. A GIF mode is available. The makers state they are not a video hosting platform. Certain Vimeo controls customization requires a Vimeo Plus plan or above.
MediaInfoOnline is an online file analyzer that lets users run MediaInfo in a browser without installing software on their computer. Files are dragged into the page and an MediaInfo report is displayed; processing stays on the user's machine and nothing is uploaded to servers. It is provided as a technology preview.
OnlineRadioBox is a directory and player for free internet radio stations from around the world. It organizes stations by region and country, supports searching by station name, genre or country, and lets users listen directly in a browser without installing software. It also offers a free mobile app for Android and iOS.
OONI, the Open Observatory of Network Interference, is a global community measuring internet censorship. OONI Probe tests the blocking of websites and apps and measures network speed and performance, while OONI Explorer displays censorship data collected from over 200 countries since 2012.
open is a GitHub repository or organization with source code, releases, documentation, or project resources.
Open Directory Downloader indexes open directory listings across more than 130 supported formats, including FTP, Google Drive, AList, and GoIndex. It is written in C# with .NET (Core) and is cross-platform. Downloading is not yet implemented, but the resulting file can be used with tools such as wget or aria2c.
Open Directory Finder is a web tool that enables users to search for various content types such as video, audio, pictures, software, and games across open directories. It offers loose and strict search modes.
An open-source coding agent built for low-cost and open-weight models.
Open Interpreter is a GitHub repository or organization with source code, releases, documentation, or project resources.
Localforge is an open source local coding agent with a user interface. It is hosted on the GitHub repository rockbite/localforge, where contributors can engage in its development by creating a GitHub account.
Read practical guidance on starting and contributing to open-source projects.
Open UI is a W3C Community Group that aims to let web developers style and extend built-in web UI components and controls such as dropdowns, checkboxes, radio buttons, and date or color pickers. The group plans to specify component parts, states, behaviors, accessibility requirements and test suites, and to implement polyfills for extensible controls.
open_UMR is a cross-faculty publication hub at Philipps-University Marburg. It collects scientific publications, resources, research data and software from members and makes them openly accessible. Submissions are subject to curation to ensure quality and re-usability. The site lets visitors select a community to browse its collections.
An open solution to the Data Science Bowl 2018, based on the topcoders winning solution from ods.ai. The repository was archived by the owner on Jun 22, 2022 and is now read-only. It uses PyTorch and references neptune.ml, though running it as a plain Python script is possible.
An archived, read-only GitHub repository holding an open solution to the Google AI Open Images Object Detection Track. It offers starter code, configs and notebooks, with RetinaNet training and references to the Neptune experiment platform; Neptune use is optional and the code can run as a plain Python script. The README notes the competition used Open Images Dataset V4.
An archived, read-only GitHub repository holding an open solution to the Home Credit Default Risk challenge. It provides code, configs and notebooks plus documented solutions using LightGBM, sklearn and XGBoost with engineered features; the README lists cross-validation and leaderboard scores for each. References to Neptune are optional and the solution can run as a plain Python script.