Products of T-file
Utilities \ File & Disk Management
As a person who's slightly OCD, I like my files to be neat and tidy and while there's support for tagging major files types like MP3 I find my self limited by the tags I can use as well as the files that are supported. Hopefully this is the solution. T-File - Universal.
Freeware download of T-File - Universal Taggin Program 1.0, size