This report summarizes the governance of open source softwares (OSS), primarily in the GLAM sector (galleries, libraries, archives, museums); a couple non-GLAM softwares are also included. Just as FOLIO is a world-wide effort, the softwares and their communities discussed also span the globe, though they largely originated in the English-speaking world. The oldest of these softwares date to the late 1990s, while the newest are still emerging. Overall, OSS governance differs between softwares in the following ways: formality of structure; requirements for membership; relationship to for-profit vendors; and relationship to other organizations and individuals.