The Pushkin Institute's free A1–C2 distance course, with level tests and certificates.
Details
Six modules spanning A1 to C2 from the state institute that specialises in teaching Russian as a foreign language, covering all four skills plus pronunciation practice, free after registration and with an internal level certificate at the end. The breadth is unmatched among free courses. The platform is dated and largely Russian-interfaced, and support is minimal — it rewards self-disciplined learners.