BBC Playlister just released a cards based UI for music playlists.
believe.in just released a cards based UI for their homepage.
MINIMETEO app | Designer: Ministry of Simplification | Buy: http://itunes.apple.com/app/minimeteo/id526381557?ls=1=8
Maxi card, followed by a bunch of midi cards.
UX, UI, Interface, Badge, Card, Game | Via luiskonrad.com
award.io card-based flat designed contest page.
Cards based email message from fancy.com. Works very well on mobile.
learni.st cards based lessons UI.
Kickstarter.com uses consistent card designs for projects.