These links will take you directly to the portions of databases that contain materials relevant to Modern Languages. However, this is by no means an exhaustive list. Feel free to explore the General Collections to find additional resources.
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. COERLL's mission is to produce and disseminate Open Educational Resources (OER) for the Internet public (e.g., online language courses, reference grammars, assessment tools, corpora, etc.).
Open Learn is an initiative of The Open University, UK. It provides supplemental materials for educators, including articles, podcasts, videos, games, and much more. In addition, it offers more than 700 free online classes.