Learn with Oliver
Learn With Oliver is a simple website that offers SRS flashcards with audio recordings by native speakers, random videos and articles with a list of keywords, choose your own adventure stories, writing practice with corrections by native speakers, and progress tests. The flashcard words and sentences seem to have been randomly chosen rather than curated to specific learning goals, so they are probably better used as enrichment than as a primary learning tool. The site as a whole is probably best for learners who already have a good grasp of basic vocabulary in their target language.
The mixed exercises use spaced repetition to first introduce you to new words, then get you practicing through various word order, fill-in-the-blanks, listening, writing, and multiple-choice activities. Each “card” (more like “page”) allows you to see an overview of each word with example sentences.
A cute perk you will receive after completing each day’s lesson is a “reward link,” which is typically a cute or funny picture on Reddit.
If you’re looking for alternatives to some of the features on this site, LangCorrect may have a larger community of language learners to support you in improving your writing, Readlang and the Zhongwen Chrome Extension will help translate words on most websites, Yabla will teach you languages through video clips, and sites like Readle (German) and Du Chinese can help with your reading comprehension.