Evergreen ( https://evergreen-ils.org/ ) is a free-software integrated library system (ILS). As an ILS, it essentially comprises a set of digital tools for managing a library catalog and the circulation of its items, that is, “it helps library patrons find library materials, and helps libraries manage, catalog, and circulate those materials”. Free-software is software that is free to download, use, view, modify, and share. Evergreen was initially developed and released by the Library of Georgia in the early 2000s; it is now widely adopted by libraries around the world and benefits from an active community of closely working users and developers. The official documentation can be found here: https://docs.evergreen-ils.org/docs/latest/index.html.