wolfoz

Improved use of hierarchical taxonomy metaboxes for products, posts, etc. 
Automatically select parent elements when an element is selected and automatically deselect child elements when an element is deselected. 
Support for custom taxonomies. Highlighting the changed state of elements.

WolfOz taxonomy mbtree

Tree view for metaboxes of taxonomies (products, publications, etc.)

Anshi Solutions

This plugin shows the WordPress Category or any taxonomy in an interactive and responsive tree layouts. It can be used to generate mind maps using the WordPress taxonomy.Just add the shortcode [category-d3tree] to your post and the plugin will generate the treeview from your category. It uses the D3 javascript library to generate the interactive tree from the taxonomy. A demo of the plugin can be seen here http://wp.anshisolutions.com/category-tree/
This plugin also support addiitonal Force Directed and Radial Layouts for the taxonomy hierarchies.

Category D3 Tree

This plugin shows the Wordpress Category or any taxonomy in an interactive & responsive tree layout.

WolfOz taxonomy mbtree vs Category D3 Tree