Elefront is a plugin all about managing model data. It allows the user to assign metadata to geometric objects within Rhino, thereby allowing the model to be treated as a sort of database. Elefront also includes components for interacting with blocks, as well as components for filtering geometry by their attributes, layer, geometry type, and so on.
In my view, Elefront is essentially the Grasshopper plugin.
The Rhino Plugin merely adds a Property panel, same as Rhino’s “Attributes user text” panel, except it hacks the display of the special Elefront “Bakename” property…
Therefore, I think this category should be under “Grasshopper”, not under “Plug-ins”.