Captain Hindsight fills a Minecraft cape from top to bottom, the outside matching the lining. Take the HD file or the 64x32 one, both free to grab and wear.
Free, and nothing to sign up for.
mc-capes
Chameleon
Cheetah
Chuck Norris
Citizen Steel
Claire Bennet
Cloak
Clock King
Colossus
Cottonmouth
Crystal
Cyborg
Cyborg Superman
Cyclops
Dagger
Daredevil
Darkhawk
Darkseid
Darkstar
Darth Maul
Dazzler
Deadman
Deadpool
Deadshot
Deathlok
Deathstroke
Demogoblin
Destroyer
DL Hawkins
Doc Samson
Doctor Fate