Here’s an awesome link with short descriptions of popular instructional design models for online courses and learning activities in general. The models are different, and there is even Bloom’s Taxonomy listed, which to me is not literally a model, but a very useful classification of verbs describing learning activities. Don’t forget to check out the adaptation of Bloom’s original taxonomy for the digital age by Andrew Churches.
The ADDIE model is a very broad model, describing giant steps in the design process. It could even be used as a guideline for the project management. And on the other hand, there’s Gagné’s 9 Events of Instruction which is applicable to small learning sequences and modules of a course.
The other described models are: SAM, Dick&Carey Model, Action Mapping, Kemp’s Instructional Design Model, Kirkpatrick’s 4 levels of training evaluation and Merrill’s First Principles of Instruction.
Thanks to instructionaldesigncentral.com for this precious resource!