Do you have any suggestions for fun little apps to replace all the features that all facebook properties have to offer? Because, lets face it, owning 3 of the 5

Do you have any suggestions for fun little apps to replace all the features that all facebook properties have to offer? Because, lets face it, owning 3 of the 5 top social apps in the world is way to much power for a single company (which is just a group of people).