Leapfrog are an online gaming software developer behind the design of three bingo sites: Bingo Café, Bingo Liner and King Jackpot. Their unusual selling point is their provision of 3D virtual interactive bingo rooms. Players can choose a three dimensional character, which is able to physically move between rooms, interacting with fellow players as he / she does so. Many players like this extra dimension of realism, which can really add to the typical online bingo experience. Leapfrog sites are proving very popular as they really do offer something different in a crowded and competitive market.