1)   Simple MP3 Renamer 6.0
Rename MP3 files that you download from file sharing programs. No complicated options, just drag and drop your folders / files into the program and click 'Rename'. MP3s will have case corrected, underscores removed, appropriate spaces added.

 2)   Autumn MP3 Tagger 2.10
Easy to use, fast and powerful tool for tagging and renaming your mp3 files. Aside from basic tag support, it is also capable of renaming and/or moving your files based upon existing tag data, or tagging multiple files via customizable patterns.