MP3 downloaded might not always have proper tags added to it, mostly it would also include the website details from where it was downloaded. MP3 Tags Edit is a freeware application which allows you to easily edit the MP3 tags and comments of all MP3 files. The application is portable and you can easily select the file and edit the details.
You can change information like title, artist , album, year, comment in your mp3 files by a simple click. This way you can easily organize the MP3 files in your PC. Although the application works well, it does not have an option to select multiple files to editing tags.
Same or even more with Foobar 2000:
right click on the track and properities.
Cheers,
Szymon