My first public plugin for WordPress. It replaces the category’s check boxes by a dropdown menu on post’s edit page. It limits your choice to only one category per post for categories you selected in settings.
It could be useful in case if you need publish posts only in a single category , it makes you avoid miss-manipulation, no more need to check or uncheck checkboxes.
The plugin works with the default and custom hierarchical taxonomies. Very easy to use, install, activate and configure in settings to chose taxonomies you want to replace.
More information HERE