Levendas y arguetipos del Romanticismo español - Robert Sanders, Portland State University
Acceso - an open-access, digital learning environment designed to promote the acquisition of Spanish and the development of cultural understanding of the varied groups of people who share Spanish as a common language
coerll: Center for Open Educational Resources and Language Learning The Center for Open Educational Resources & Language Learning (COERLL) is one of 16 National Foreign Language Resource Centers (LRC's) funded by the U.S. Department of Education. The overall mission of these federally-funded centers is to improve the teaching and learning of foreign languages by producing resources (materials and best practices) that can be profitably employed in a variety of settings.
OpenStax CNX - Spanish - Several open textbooks on topics related to learning the Spanish language
Carnegie Mellon Open Learning Initiative:
Washington State Board for Community and Technical Colleges Open Course Library: