PNG ICO ICNS MORE
Desktop apps
Smooth
Icons Mega Pack 1 and 2
Spotify
YellowGreen
256x256
Flat
Soft Social Icons
podcast, music, Spotify
48x48
Free Colorful Icons
360x360
PNG MORE
Appicns
Spotify, appicns
512x513
Metro UI Dock
Spotify, Mirror
640x640
512x512