Foreign Services Institute

The American Foreign Services Institute offers their language learning materials for free personal use. Though the site is basic, bear in mind that these materials are high-quality, designed by professional linguists with the goal of learner fluency.

Pros: An impressive resource for lesser-studied languages, especially African tongues like Igbo and Shona. The audio recordings, while a bit fuzzy, are well organised.

Cons: Compared to the graphics of the other sites, the materials seem austere, with simple black-and-white PDF texts. Also, the lessons are organised around grammar and repetition, which some learners dislike.

Best for: People who learn best with the structure and rules of grammar-based study. These lessons could also serve as a great supplement to listen-and-speak material.

отсюда (Learn a language for free: the five best websites)