http://www.youtube.com/watch?v=u7deClndzQw Barcelona, "Please Don't Go"

http://www.youtube.com/watch?v=atKv1JyQgV8 Poets of the Fall, 'Late Goodbye"

http://www.youtube.com/watch?v=GRz4FY0ZcwI Five for Fighting, "Superman"

http://www.youtube.com/watch?v=tR-qQcNT_fY Five for Fighting, "100 Years"

Satie's "Gymnopedies" piano pieces are great.

Erik Satie's been mention already but, it's a must. Here another one of his: http://www.youtube.com/watch?v=PLFVGwGQcB0.

The Cure's Same Deep Water as you is pretty melancholy, too.

Well, I'm in a public place so I can't hear your definition of sad or meloncholy. Two songs that come to mind aren't depressing, but aren't cheery either:

Piano Man buy Billy Joel.

Taxi by Harry Chapin, although it doesn't have a piano.

Thanks guys

http://www.youtube.com/watch?v=CMqPxLSDTQs

http://www.youtube.com/watch?v=ikBg4BDgsso

Deine Lakaien - Lonely

http://www.youtube.com/watch?v=eriAe4AceM8

Two songs from Sully Erna's solo album come to mind..

http://www.youtube.com/watch?v=3RkWrR4tlwQ&feature=related

http://www.youtube.com/watch?v=gOer-dixf2w

• Even though they're strings rather than piano, check out http://www.youtube.com/watch?v=BacmKiXC8gc. They're too awesome not to mention. Good luck finding their albums anywhere, though.
  
• Fleshgod Apocalypse has one really good piano song called http://www.youtube.com/watch?v=Nzg6UqWgmGc. They're a death metal band, though, so expect a drastically different sound from any of their other songs.
  
• http://www.youtube.com/watch?v=jdQ0-cawsiA by Dawn of Tears has a beautiful ending. It's normally an almost 15 minute song, but I was able to serendipitously find a YouTube video with only the end two or so minutes.
  
• Ok, here's another song that's nearly only actually piano: http://www.youtube.com/watch?v=2wKxdbxcZoo by Burzum.
  
• Here's one of my favorite piano songs from a video game: http://www.youtube.com/watch?v=PMvOkUMPZ0gl from Silent Hill (I think) 4.
  
• http://www.youtube.com/watch?v=ubeVUnGQOIk from the Snowman is a childhood classic for me. Listen to it. The http://www.youtube.com/watch?v=AaWPduHl_j8 of it is really good, too.

I know Satie has been mentioned a couple times, but http://www.youtube.com/watch?v=i8356FxUT20 hasn't been.. It's may favourite of his. :whistling:

http://www.youtube.com/watch?v=qKZE5ICReZ8