Gaming:: Nim was designed with gaming in mind. See documentation regarding speed and GC. If you are working on a game like a baseball simulator then Nim can maybe offer the fast performances you need to simulate intensive game play, artificial intelligence, graphics, audio sound processing, and all of the other functionalities of modern gaming.
System libraries:: Nim can produce libraries to be used by other languages. https://gradha.github.io/articles/2015/01/writing-c-libraries-with-nim.html[docs] https://akehrer.github.io/nim/2015/01/24/connecting-nim-to-python.html[example]