Is there an IC to make a split power supply from a single power supply?
You could use two identical regulators, isolate them and tie the positive rail of one and the negative rail of the other together. That's usually how it's done with DC DC converters, in case you need a high current: some DC DC converters are already isolated (some even do the entire conversion from unipolar to bipolar).

If you don't need a high current you can opt for integrated circuits like the one Roger Rowland has suggested in the comments of your question. Those ICs are basically: 1) charging a reservoir capacitor with the input 2) isolating it from the input 3) connecting its positive terminal to ground and its negative to the output terminal 4) Isolating the reservoir from the output and connecting it to the input - over and over again thanks to a clock and some logic. The output is filtered to get a smooth negative rail. 

Of course, if applicable you could also use half your supply, provided by a separate regulator, as the reference instead of ground (that's what biasing does basically).