Based on our record, Common Open Research Emulator (CORE) seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
My group used to teach Computer Networks at a university ([1] gives a fair overview of the scope if you know Croatian or use a bit of Google Translate). We used CORE and PHP built-in web server [2] for the basic course. IMHO, stuff like Shadow is too overwhelming for the introductory course, but we planned to use it together with ns-3 and SimGrid for the advanced course (which in the end we never got a chance to... - Source: Hacker News / about 1 year ago
ns-3 - a discrete-event network simulator for internet systems
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