Opus #1: This music is from the ending of a Japanamation series called, "Maison Ikkoku" by the artist/author of the Ranma 1/2 series.
Opus #2: This music is Beethoven's "Moonlight Sonata".
Opus #3: This music is Ravel's "Pavane Pour Une Infante Defunte".
Opus #4: This music is very unique! By Squaresoft (a Japanese video game company), it is the third movement of the opening scenes from the highly popular Super Nintendo game "Final Fantasy III".
Opus #5: This music I heard just by happenstance as I listened to a all-classical music radio station one morning on the way to work. As soon as I heard it, I knew that I had found the perfect music for Opus #5. It is by George Winston on his "December" album (Windham Hill), and is called "Thanksgiving".
Opus #6: This music is "Adagio for Strings" by Samuel Barber. I highly recommend listening to it in its entirety on CD.
Shalom: This music is by Elton John. It is called, "Song for Guy".
Links: This music is Pachelbel's "Canon in D major".