Clozemaster is a language learning game focused on building vocabulary through mass exposure to sentences. The core mechanic involves filling in a missing word (a "cloze") in a sentence. It uses a spaced repetition system to re-test words and features a heavily gamified interface with points and leaderboards. Sourced from a large corpus of translated sentences, it's an excellent tool for intermediate learners to move beyond basic vocabulary and see words used in a wide variety of contexts, which can implicitly reinforce grammar.

Speechling is a non-profit platform singularly focused on improving spoken fluency and pronunciation. The method is simple yet effective: you listen to a sentence from a native speaker, record yourself saying it, and submit your recording for feedback from a human coach. This targeted approach provides personalized corrections that automated speech recognition cannot offer. It is not a comprehensive course for learning a language from scratch, but rather an invaluable tool for learners who have a basic foundation and want to refine their accent and conversational confidence.