The following are notable organizations devoted to the advocacy, legal aid, financial aid, technical aid, governance, etc. of free and open-source software (FOSS) as a whole, or of one or more specific FOSS projects. For projects that have their own foundation or are part of an umbrella organization, the primary goal is often to provide a mechanism for funding development of the software.
For the most part, these organizations are structured as nonprofit/charity organizations.
This list does not include companies that aim to make money from free and open-source software.
The following organizations host, and provide other services, for a variety of different open-source projects:
The following organizations host open-source projects that relate to a specific technical area.
A large number of single-project organizations (often called "foundations") exist; in most cases, their primary purpose is to provide a mechanism to bring funds from the software's users, including both individuals and companies, to its developers.