Website: http://pixlr.com/express/
Free iPad app: https://itunes.apple.com/app/pixlr-express-plus/id526783584?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/app/pixlr-express-plus/id526783584?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.pixlr.express