A large free bank of SFI exercises — grammar, nouns, verbs, sentence structure.
Details
Built for Sweden's SFI (Svenska för invandrare) system, this is a deep free archive of drills on vocabulary, noun and verb forms, word order and pronunciation, organised by level. For anyone who wants volume of practice without paying, there is more here than in most paid apps. Completely free with no signup. The catch is presentation: the site is visibly from an earlier web era and navigation is clumsy — worth tolerating for the content.