Solves the co/multi-author problem without modifying the theme. Uses a custom taxonomy, "Byline," that replaces the Display Author.

Add an Co-Authors facet to FacetWP

The plugin add a widget and a shortcode in order to show authors of an article. It is compatible with Co-Authors Plus.

Simple Yearly Archive is a rather neat and simple Wordpress plugin that allows you to display your archives in a year-based list.