Erick Hitter

Add support for date-based taxonomy archives.
Includes a function for rendering an unordered list of years with months, linked to corresponding date-based taxonomy archive, nested therein.
This plugin is intended for use by plugin and theme developers. It simply adds support for date-based taxonomy archives, but has no native user interface.
Development is over on GitHub: https://github.com/ethitter/Date-based-Taxonomy-Archives/.

Date-based Taxonomy Archives

Add support for date-based taxonomy archives. Also includes a function for outputting archive links.

Javier Villanueva

Post Category Filter allows you to filter through your post categories and custom taxonomies by adding a search box on top of the term lists. The lists will update live as you type with only the relevant results based on your search query.
<h4>Want to contribute?</h4>
You can follow the <a href="https://github.com/jahvi/post-category-filter" rel="nofollow ugc">Github repository</a> and submit issues or pull requests.

Post Category Filter

Filter post categories and taxonomies live in the WordPress admin area

Date-based Taxonomy Archives vs Post Category Filter