Is there an add-on that you can group topics together basically in a dropdown/arrow that can open specific topics?

Basically I have about 10-15 topics that are all similar, but need to be separate topics. However, I don't want to pin them, nor do I really want them all cluttering up the main forum. They do need to be on the main forum though.

Any ideas or suggestions?

Thanks

I think the best strategy is to use tags, which can be used to group together similar topics or content across the suite.