Directory
Published directory entries matching your search.
The Open Energy Platform is a site for making energy system modelling transparent. It offers a database where contributors publish datasets under an open license for download, scenario bundles giving context to contributed data, and the Open Energy Ontology for data annotation and management. An academy provides courses and tutorials on Open Energy Family tools.
Open Science OVGU is the former open access repository for research data and publications of Otto-von-Guericke University Magdeburg (OVGU). It is no longer actively maintained, and users are advised not to enter OVGU login details on the site. The repository hosts communities for research data and open educational resources, and includes recent submissions such as the 2024 TapCorder Data Set, which explores classification of oily or cream-like substances using smartphone-captured diffraction data.
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.
OpenAlternative is a curated collection of open source alternatives to everyday SaaS products. The site lists projects with repository stars, last commit times, licenses, and short descriptions, and notes support from partners and sponsors. It describes itself as a crowdsourced directory of open-source software.
OpenChaos.dev is a self-evolving open source project in which the community votes weekly on pull requests and the winning PR is merged. The site frames this as Control versus Chaos and lists past winners in a Hall of Chaos. It also references voting countdowns and a project tag cloud.
OpenClaw is an open-source AI assistant that runs on the user's machine and works from WhatsApp, Telegram or other chat apps. According to the site, it organizes inboxes, sends emails, manages calendars and checks users in for flights. Desktop apps are listed for macOS, Windows and Linux, and an enterprise platform is in development ahead of a 1.0 release.
OpenCorporates provides legal-entity data drawn from official primary sources across more than 140 jurisdictions. It offers search of its legal-entity database and access to data through a self-serve API or secure bulk delivery. The site lists use cases including entity verification, third-party risk management, investigations and data management. API plans carry stated monthly and annual prices.
OpenCritic is a review aggregator for video games that collects reviews from top publications such as IGN, GameSpot, Polygon and Eurogamer. The site also offers browsing of games by platform and lists of top rated games of all time.
OpenGeofiction is a user-made map of a fictional world, created using the OpenStreetMap software platform. The site is run by volunteers and funded by donations, and use of the website or other provided infrastructure is subject to the Terms of Use. It offers a way to learn more and start mapping.
OpenHeritage 3D is a platform that hosts 3D datasets of heritage sites. It publishes news about heritage locations, provides access to its datasets, and operates a YouTube channel with hundreds of preview videos of its 3D heritage models. The platform also offers labs, an FAQ, contact information, and accepts donations.
OpenLM Arena is a leaderboard site that ranks large language models. It bases rankings on three benchmarks: an agent-driven battle platform with Bradley-Terry Elo ratings from LLM-as-a-judge votes, a Model Intelligence Index, and the ARC-AGI-2 general intelligence benchmark. The page lists models with Elo, coding, vision, MII and ARC-AGI figures alongside organization and license.
OpenPaper is the official site for Paperwork, a personal document management tool. It allows users to scan or import personal documents, search for them using keywords, store files in a single synchronizable directory, and add labels for organization.
Public payroll search site covering government salaries, positions, agencies, and compensation data.
OpenRCT2 is an open source re-implementation of RollerCoaster Tycoon 2. The site offers a download of the latest release and an OpenLauncher, plus a getting started guide, user manual, FAQ, Discord and Reddit support channels.
OpenSourceFeed is a gallery of GNU/Linux, BSD and other open-source distributions and open-source desktop environments, with updates and stories on each. The site also publishes recent news items about distribution releases.
OpenSourceGen is a free AI image and video generator that creates AI art, realistic images and videos from text. The site offers daily free credits and states that no login is required.
OpenStreetMap is a map of the world created by contributors and free to use under an open license. The site offers help resources, including a beginners' guide, a community forum, mailing lists and a wiki.
OpenTierBoy is a free, open-source platform for creating and sharing tier lists. It offers community-curated templates and lets users add custom images, which are not saved to a central database. Lists can be shared by copying the URL. The site states it has no ads, logins or sign-ups.
OpenTunnel is a free tunneling service offering SSH, V2Ray, XRay, OpenVPN, WireGuard and other accounts. The site states that accounts are free, servers offer unlimited bandwidth and are online 24 hours, and no logs are used to monitor activity. It lists total server counts per protocol.
OpenXNG is a privacy-respecting, open metasearch engine powered by SearXNG version 2026.9.26+c52ce3835. The site provides access to the SearXNG source code, issue tracker, engine statistics, public instances, and contact information for instance maintainers.
oPhysics is a collection of interactive physics simulations created by retired physics teacher Tom Walsh. Most animations and simulations were made with GeoGebra software. The site states it is a work in progress and content is added as time allows. Material may be used for non-profit educational purposes.
Optery is an opt-out service that finds and removes personal information from data brokers and people-search sites. It provides an exposure report and self-service removal tools on a free tier, with paid plans adding automated removals and custom removal requests. A 30-day money-back guarantee is offered for individual accounts.
optimize.photos is a tool for compressing high quality JPEG images. According to the site, it compresses them 35% more than traditional codecs and is powered by Google's Jpegli. It accepts files by drag and drop and states that images are never sent to its servers.
ORBi is the institutional repository of the University of Liège. It holds deposited items and open access full texts, and offers a public interface where authors add their publications. The site provides guidance on first steps, on improving the visibility of research, and on linking ORBi information with ORCID identifiers.
