This site has song lyrics and soundtrack archive search engine. You can download lyrics including MP3 format.
This site is a lyrics search engine, including movie soundtracks. You can search by album, artist, lyrics, and singles.
Songs Lyrics has a lyrics archive, including soundtracks, which is updated daily. You can suggest a lyric to add to their database.
This site has soundtrack lyrics for movies, cartoons, TV, musicals, including new and popular original soundtracks. It is updated weekly.