This circuit was originally from a fairly old book I read about op-amps (as most op-amps require a split-rail supply), and as such it used somewhat now hard to find transistors, but I have updated it to use readily available components. I have also designed a stripboard layout, and you can see in the first picture just how small and simple it is. This circuit creates a virtual ground right in the middle of the voltage range, and the two rails are buffered for maximum stability.
The disadvantage of this circuit is that the output voltages are half of the value of the input voltage (if you put +9V in, you'll get +4.5V and -4.5V out). Of course, the advantages are that this circuit is tiny and extremely cheap to build - it cost me less than £1.
Finally, don't forget that the transistors are not the same! One is a BC549 NPN transistor, and the other is a BC559 PNP transistor.