Yoni Luksenberg relates that when he walks around Bnei Brak, the ultra-Orthodox city in central Israel that he and many devout Jews call their hometown, young Haredi men will occasionally stop him to tell him about their idea for a great new app or website. It began after the first time he appeared in the newspaper. Word got out. "I'm an anomaly," he admits. "I do it all: pray, keep kosher and maintain a Haredi lifestyle, but I don't wear a suit."