TuneWiki is a program that comes in handy whenever you need to find the lyrics for a song that's being played in iTunes app. This application automatically displays the words of the tune you listen to, synchronized with music, so you can make good use of this app at a karaoke party.
As soon as you play a song within iTunes, TuneWiki looks for the corresponding lyrics in its comprehensive database and offers you the results you require almost instantly. If the app is unable to locate the words of a song, you can upload the lyrics directly from the application (you need to create a personal account first).
The program allows you to customize the appearance of the main screen by changing the font size, background color, and the spacing between the lines. You can also edit the lyrics for any tune being played in iTunes, but again, you need a TuneWiki personal account in order to do so.
The only thing I don't like about working with this application is that it occasionally fails to display the lyrics for some songs as they're missing from the developer's database. However, you can enter these information yourself if you want to.
To sum things up, TuneWiki is a simple to handle app, gives you access to lyrics for various songs, and comes with no price tag.