Music by Kevin MacLeod. Released into the public domain (CC Zero). Download link: http://freepd.com/Simple/Snowdrop

MacLeod's description:

Genre: Classical
Length: 4:38
Instruments: Piano

A somber solo piano improvisation featuring a repeated melodic tone with arpeggiated shifting chords in the bass. Ends slightly uplifting. Reminiscent of Chopin's Raindrop Prelude.
ISRC: US-UAN-11-00527
Dark, Eerie, Relaxed, Suspenseful 2009