Best app for categorizing tags?

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I'm looking for an app that will be able to categorize and group tags, so that they can then be filtered and sorted on the collection pages. 
Are there any that are particularly well known and trusted? 

So for example, this is from a particular collection, and instead of just types and genres and sort by, I would like to add 'region', as well as 'medium' and 'curator'. 
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