Open Source

Tools and Services


    An online repository of policies, schema standards, tools, best practices, and case studies to provide agencies with resources for federal data management.


    A collection of federal source code including open source software.


    Data, tools, and resources to conduct research, develop web and mobile applications.

  • U.S. Web Design System

    A toolkit of principles, guidance, and code that helps agency digital teams build accessible, mobile-friendly government websites for the American public.

Join a Community of Practice

  • U.S. Web Design System

    A community for anyone building federal websites with the U.S. Web Design System (USWDS) or considering it for a future project.

  • Application Programming Interfaces (APIs)

    Working to advance the cause of APIs in the federal government.

  • OpenGov

    The Interagency Open Government Community of Practice is where we talk about transparency, open-participation, and collaboration across agencies.

News and Events on Open Source

75 posts

18F practices in action (spoiler: this stuff works)

How well do 18F software development practices work? The 18F team reflected on a recent project for the Cybersecurity and Infrastructure Security Agency (CISA) .gov registry to gauge the effectiveness of six recommendations aligned with what they actually did. — via 18F

18F logo

Apr 03, 2024

18F Checks in With the Dawson Project at the U.S. Tax Court

In December 2020, the United States Tax Court introduced DAWSON, a modern open-source case management system developed with assistance from an industry partner and 18F. DAWSON streamlined Court operations and changed the way the public interacts with the Court. — via 18F

18F logo

Apr 25, 2023

Join us as we take a deep dive into USWDS design tokens. We’ll cover: what they are, how they’re used, and how you can adapt them to your branding needs.
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The 18F Engineering Sandwich for Cloud-based Web Apps

The 18F Engineering Sandwich for Cloud-based Web Apps—18F Engineering is often thought of as a technology shop, but that’s too broad. There are very few technology choices we actually make at the project level, so, more often than not, we combine a limited set of technologies to make our applications. To explain this, we’ll use the metaphor of a sandwich shop. — via 18F

18F logo

Sep 06, 2022

Help Us Improve Digital Forms

Help Us Improve Digital Forms—People in the U.S. spend over 10 billion hours each year completing government forms. The Office of Evaluation Sciences is working to reduce this burden and make digital forms easier and more accessible. You can help by filling out a short typical form. It will take less than five minutes! — via General Services Administration

General Services Administration logo

Jul 14, 2022

This summit brings together the federal community to share success stories and best practices for utilizing federal source code and open source software, and examine the implementation of the Federal Source Code policy.

Spotlight Story: Pioneering Open Source at the CFPB

Spotlight Story: Pioneering Open Source at the CFPB—Open source software is a fundamental aspect of how the Consumer Financial Protection Bureau has served the public in its short history. In April of 2012, nine months after opening its doors, they released their source code policy, based on the work of the Department of Defense, along with their first two open source projects. Just six days later, they accepted their first pull request. Though a minor change, this was the first documented contribution to a federal government open source codebase by a member of the public. — via logo

Jul 23, 2020