Like songs but can't get all the lyrics right? EvilLyrics to the rescue. This program is brilliant because there's no need for you to do anything. Just play any song, it automatically searched the net for the lyrics and displays them. The lyrics are stored on your drive, so the next time you play the song.
What's great is that it does not use a single source for the lyrics, instead it does a Google search and scrapes the results, looking for the appropriate site. And the interface is pretty neat too, there's a compact mode that's great. I never liked the Karaoke functionality though, seems like overkill.
Works great with Winamp. Other player are supported, but I've never tested it.