PZ TagEditor 5.0
This allows you to batch process MP3 files by creating, editing and removing ID3 tags.
It can rename your MP3 files using tags and create tags from file paths. Basic templates are included. It can also retrieve album titles from FREEDB database.
This can create PLS, M3U and HTM play lists that you can append as needed. You can also export data to Microsoft Excel.
It has a built-in player but can also work with external ones. In fact, it's optimized for use with Winamp. A multilingual interface is included.