From the developer:
"MP3Namer is a simple, yet powerful MP3 Tag Editor and Automatic File Renamer. The application allows you to organize your MP3 files by editing their built in Title, Artist, Album, Genre, Year, Track, and Comment tags. By correctly setting the tags, you can let your media player correctly categorize your music for you! MP3Namer includes a Batch-Edit feature that saves you time by editing multiple MP3 Files all at once. It also allows you to Sort your MP3 files based on their tags, making it easy for you to find files that need editing. Once your tags are correct, MP3Namer can automatically rename your MP3 files based on the tags you specify so they all have a clear and common file name. If you need to verify the contents of an MP3 file, you can play it directly from the MP3Namer application! The familiar Windows interface allows you to drag-and-drop MP3 files directly into the application where you can instantly begin modifying tags. Modified files are highlighted to make it easier to view your changes."