LEO.org (LEO Dictionary; English ⇔ German)

LEO.org provides an online English-German dictionary plus forums, a vocabulary trainer, and language courses (also available as an app).

{"Language learners","Students (Schülerinnen und Schüler)","Educators","Schools and educational publishers (e.g., Westermann, Camden Town materials)"}

A comprehensive, community-driven language learning ecosystem combining bilingual dictionaries, interactive vocabulary training with spaced repetition, language courses, and a native-speaker audio/diagrams experience, including a published-school partnership (Westermann) for curriculum-aligned vocabulary.

{"Immediate access to features via web; free trials available for courses","Two or three lessons in some courses are available to test free of charge"}