digitales.wien.gv.at
Open Data Portal of the City of Vienna, Austria.
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openknowledgemaps.org
Open Knowledge Maps is a nonprofit, open science AI-based search engine for scientific knowledge. It provides visual overviews of research topics, helps users find relevant research outputs and identify key concepts. The platform searches over 400 million outputs from more than 11,000 sources, with results based solely on underlying metadata to avoid hallucinations.
openlibrary.org
Open Library is an open, editable library catalog building toward a web page for every book ever published. Users can read, borrow and discover more than 3M books for free, and contribute corrections and new information like Wikipedia. It also provides APIs for book discovery and lookup services.
github.com
Open Nbs is a GitHub repository or organization with source code, releases, documentation, or project resources.
open-power-system-data.org
Open Power System Data is a free-of-charge data platform for electricity system researchers and power system modelling. It collects, checks, processes, documents and publishes publicly available power system data that is inconvenient to use, covering installed generation capacity, individual power plants and time series such as consumption, spot prices and wind and solar generation. Processing scripts are open source on GitHub and data is published primarily as CSV files with JSON metadata.
maxwell.vrac.puc-rio.br
Open Research Data @PUC-Rio is a project of the Maxwell System that shares data developed or modified for theses, dissertations, monographs, senior projects, articles and technical reports at the university. Datasets span all areas of knowledge and many digital formats and can be searched and retrieved. Submission requires at least one author from the PUC-Rio community and open access data.
unstats-undesa.opendata.arcgis.com
Open SDG Data Hub is an ArcGIS Hub platform focused on dataset discovery and access. It allows users to discover, analyze and download data in formats including CSV, KML, Zip, GeoJSON, GeoTIFF and PNG. The platform provides API links for GeoServices, WMS and WFS, and supports the creation of StoryMaps and Web Maps for data visualization.
github.com
Open Voice Os is a miscellaneous web resource for discovery, directories, archives, web culture, or useful tools.
ui.piveau.datenraum.freiburg.de
Open Data Portal of the City of Freiburg, Baden-Württemberg, Germany.
opendata.muenchen.de
Open Data Portal of the City of Munich, Bavaria, Germany.
open-loiret.opendata.arcgis.com
open-loiret.opendata.arcgis.com is an ArcGIS Hub site that provides access to geospatial datasets. Users can discover, analyze and download data in formats including CSV, KML, Zip, GeoJSON, GeoTIFF and PNG. The site offers API links for GeoServices, WMS and WFS, and supports the creation of StoryMaps and Web Maps.
open.bydata.de
Open Data Portal of the Federal State of Bavaria, Germany.
dortania.github.io
OpenCore Legacy Patcher is a tool that supports installing macOS updates and enabling newer features on older hardware. It uses the OpenCore boot manager to perform in-memory protocol upgrades that are never permanent, and does not patch firmware. It also supports older graphics, WiFi and Bluetooth chipsets.
bellyscan.com
Block explorer for Openpiece Mainnet, showing transactions, blocks, addresses, tokens, and network activity.
opensupplyhub.org
Open Supply Hub is an open map where brands, suppliers, and advocates search, share, and collaborate on supply chain data. It maps production locations, assigns each location a universal OS ID, and standardizes shared data for matching. Suppliers can claim and verify their location on a free supplier database, and the platform is described as a Digital Public Good.
openwebtorrent.com
OpenWebTorrent is a WebTorrent tracker that is free for anyone to use. Torrents do not need to be registered, uploaded or indexed; users include the OpenWebTorrent tracker URL when creating a torrent file.
openwrt.org
The OpenWrt Project is a Linux operating system targeting embedded devices. It provides a fully writable filesystem with package management rather than a single static firmware, allowing devices to be customized through packages. Current stable series is OpenWrt 25.12, with 24.10 as the old stable series. Source code is stored in a git tree.
orust.se
Open data portal for searching and downloading public datasets.
ostersund.se
Browse public datasets, metadata and downloadable records in an open catalog.
oxopendata.uk
Oxfordshire Open Data provides a place for the public, researchers and developers to access, analyse and share information about the area. Data may be viewed, re-used and downloaded under licence. The site offers browsing by categories including population, finance, economy, education, elections, environment, food, health, parks, planning, public safety, land and property, and transportation.
newdata-dcnr.opendata.arcgis.com
Open data portal depending on ArcGIS.
datosabiertos.gob.pa
Find published open datasets through filters, categories and keyword search.
phoenixopendata.com
The Phoenix Open Data Portal is the City of Phoenix's site for exploring city datasets, organized into groups such as transportation, public safety, and general government. It also hosts dashboards, including performance, homelessness, sustainability, and police use-of-force views. External datasets from the US Census, Department of Housing, and Bureau of Labor Statistics are linked.
data-ral.opendata.arcgis.com
Find published open datasets through filters, categories and keyword search.