I'm currently listening to music that I found just by searching 'relaxing piano' in Spotify, though I did search some other composers to find other music. I rather like Tchaikovsky, though recently I've been favouring a bit of Debussy instead. That's for a little more calming music. Chopin is also rather nice, and I've recently discovered that I rather like a little Prokofiev. I was aware of the style of Prokofiev's music, but had not listened to much of it until yesterday, it's rather feisty :), not the best to keep me calm and focused on uni work, lol, so I've had to abandon that while in uni!
A couple of pieces I particularly like (and could find on YouTube) from the ones I've been listening to the last couple of days are: