Red millipedes, Centrobolus annulatus are quite common in the garden, they tend to chew on plant roots but they aren't a serious pest. They are bigger than the common black species that @ewkaw was wondering about and they are harmless, unable to bite or sting, curling up into a little spiral when threatened. They secrete a vile-smelling black liquid if you bother them some more and they are rather cute to watch as all those little legs move in waves while they walk.
Those tiny little legs even take this one up a vertical rock and then down again.
These poor creatures get hunted by Millipede assassin bugs that are cousins of the stink bug family which attack them and suck their body fluids.
Image source: Wikipedia
These are also common over here and a lot more evil-looking than the millipedes!