INDEXAR – Digital Knowledge Repositories, is a platform that manages information on national digital repositories and journals in the fields of science, technology, and culture. This platform resulted from a Simplex+ initiative led by the Foundation for Science and Technology (FCT) through its digital services unit, FCCN, and in collaboration with Universidade Nova de Lisboa (UNL) and the Directorate-General for Books, Archives, and Libraries (DGLAB).