My preference would be just for macros.
Let's see how this idea goes.
If it works well, then we could add a similar topic to the "plugin" category.
I'm trying to look at this from the perspective of a new KM user.
If a user is trying to find/select a macro they need, how do they do it?
We have a mixed blessing: We have a lot of macros published/shared, but they are a variety of usefulness and quality. The "Best Macro List" is just one way of highlighting those that the user community have found most useful.
Plugins are a complicated subject, and they deal with KM Actions, not Macros.
So, to keep things simple for now, I'd rather stick with just Macros here.