Dataset Search enables users to find datasets stored across the Web through a simple keyword search. The tool surfaces information about datasets hosted in thousands of repositories across the Web, making these datasets universally accessible and useful.
Learn more at https://www.blog.google/products/search/making-it-easier-discover-datasets/

Data USA combines publicly accessible US government data from a variety of statistical agencies and brings it to life in more than 2 million visualizations. Data USA is a collaboration among Deloitte, MIT Media Lab’s Collective Learning Group, and Datawheel,

A topic-centric list of HQ open datasets.

Dataverse is an open source web application to share, preserve, cite, explore, and analyze research data. A Dataverse repository is the software installation, which then hosts multiple virtual archives called Dataverses. Each dataverse contains datasets, and each dataset contains descriptive metadata and data files (including documentation and code that accompany the data). The Institute for Quantitative Social Science (IQSS) collaborates with the Harvard University Library and Harvard University Information Technology organization to make the installation of the Harvard Dataverse openly available to researchers and data collectors worldwide from all disciplines, to deposit data.

Here you will find data, tools, and resources to conduct research, develop web and mobile applications, design data visualizations, and more. Data.gov is managed and hosted by the U.S. General Services Administration, Technology Transformation Service.

There are 703 open data datasets available on data.world.
Find open data about open data contributed by thousands of users and organizations across the world.