zabatonni

Automatically finds duplicate terms (with same name) in each taxonomy, then moves posts from duplicates to its original terms and deletes duplicate terms.
You can choose which duplicates you want to merge and delete.

Merge duplicate terms

Plugin for easy merging duplicate terms (tags, categories, ...)

launchinteractive

This plugin allows the Visual Composer editor to work with <a href="https://wordpress.org/plugins/merge-minify-refresh" rel="ugc">Merge + Minify + Refresh</a>.

Merge + Minify + Refresh Check Visual Composer

Disable MMR when editing a page using the Visual Composer editor.

Merge duplicate terms vs Merge + Minify + Refresh Check Visual Composer