List Category Posts (and List Category): Does EVERYTHING
List Category Posts GUI: GREAT for avoiding command line and speeding things up
Display Posts: An alternative to List Category, but no GUI, and had difficulty making it do custom Taxonomies
Rename Taxonomies: Some Plugins don't give their Taxonomy a custom name and leave it at the default "Category". This makes it difficult to find using other plugins.
Category Order: Allows for GUI modification of ordering of Categories when displayed in Admin.