SPDX License List - a comprehensive list of commonly found licenses and exceptions used for open source and other collaborative software.
Software Freedom Conservancy - a not-for-profit charity that helps promote, improve, develop, and defend Free, Libre, and Open Source Software (FLOSS) projects.
Software Freedom Law Center - provides pro-bono legal services to developers of Free, Libre, and Open Source Software.
Open Source Initiative - an organization dedicated to promoting open-source software.
GitHub - a web-based Git or version control repository and Internet hosting service that hosts a voluminous repository of open source projects and libraries.