Instructional Evaluation Service Course
This is an OER course on instruction design that, appropriately, is a reasonably good example of instructional design. I say reasonably because it could be better in terms of visual design and wayfinding.
Designing and Teaching for Impact in Online Courses
This course could be a more visually effective, but on balance it's a decent example of ID principles like chunking content, checking for knowledge, and accessibility. BONUS: Lots of good ID info in the course itself.