Didn't expect the first set to be so popular! Needed to add a Stripe one for myself so figured I'd make a few others while at it. All the old ones are now a lot neater, pixels hinted a bit more finely and better vector shapes.. generally just neater files and more crisp. Feel free to hit 'L' if you've used them! アイコン クレジット カード アメリカン エキス プレス Card Icons 2.0 (Free)
Needed some credit card icons for a page I'm working on and found the great set by @iansilber. I wanted to add a few extra styles and decided to just run with it and create a set. PSD attached if anyone wants to get involved. アイコン アメリカン エキス プレス bitcoin Credit Cards (Free)