"There are two components to this online program: the video-based learning materials online Deutsch im Blick and the zany, irreverent exploration of German Grimm Grammar." For the companion open textbook, see https://open.umn.edu/opentextbooks/textbooks/249

Links to various resources, from U of Texas.

"This online grammar reference was created for lower-division language courses at the University of Texas, but any beginning or intermediate learner of German may use it completely free of charge, as long as he or she is willing to take a trip to the imaginary world of Grimm Grammar ... the characters of which are grumpy and gorgeous, scary and smarmy, witty and wicked!"

Videos for intermediate students of German.

"Whether you’re starting out or have been speaking German for years, one of these podcasts is sure to grab your interest." - from Babbel Magazine, Jan. 26, 2022.

Podcasts that "tell true-to-life stories in authentic German, stories you can understand with just a little prior knowledge of the language."

Animated grammar, exercises, etc.

Online exercises; learning partners from around the world. Varioius skill levels. From Goethe Institut, San Francisco.