A free program for Android, by Fresh Engine.

Automatic Lyrics Finder is a handy application that lets you know all the lyrics for any song or artist that you care about. It is very easy to use, just download the app, select the song you want to check, click on the Find button, and it will be displayed in seconds, there are no limits on the number of lyrics that you can see.

You can also view the album art of the songs you are listening to, this is a very helpful function, especially if you want to know who the artist is behind the song you are listening to. You can also browse all the available genres in the app, to have a better idea of what kind of songs you can check.