Everyone needs apps, and not just mobile developers. If you’ve moved beyond the basic Facebook offerings, or think you might be about to evolve, then you should be considering some of the extremely useful apps out there. One word of warning: when you use them, they can reap data from your account. But if you’re happy with this (and let’s face it, you don’t get much choice whatever app you use), then go for it. Mari Smith gives probably the best run-down of available Facebook apps, even if it’s very slightly out of date by including FBML (just one of the tyrannies of time when blogging). I’m pretty sure the rest of it is intact. If you’re not sure, check it out. All of it.