Tagr helps you organize your MP3 collection. With Tagr you can easily edit information such as a song’s artist, title, or album cover. Tagr also allows you to control the way your files are named. Tagr features an integration with discogs.com which allows you to search for album information and artwork and apply it to your songs.
LOUNGE DELUXE I couldn't find the promised integration with discogs.com which allows the user to search for album information and artwork and apply it to the songs. I did find an option "search on Amazon" for finding cover art.
If Tagr is or would be able in the future to extract data from Discogs then that would be really useful. (Version 2.1.3)
Its a little rough around the edges (crashes sometimes), but for the price it's the one I'll be using. Overall its a pretty simple editor. I like it because most of my podcasts never makes it to iTunes and this app affords me the opportunity to add proper tags along with custom artwork to my podcasts. (Version 2.0)