Vinylify - Create your own personalized vinyl record online
Photopea - Online photo editor, which can work with PSD, XCF and Sketch files (Photoshop, Gimp and Sketch App).
The Life of Pablol - Kanye album art generator
Replace Cover - Create beautiful cover art for your Spotify playlists
SOUNDS DELICIOUS - A vinyl club for full-length cover albums.
Headers.me - Create social cover images that get you followers