  Non-statistical event-by-event fluctuations in relativistic heavy-ion
collisions have been proposed as a probe of the phase transition of hadronic
matter to a deconfined phase of quarks and gluons, the so-called Quark-Gluon
Plasma. In a thermodynamical picture of the strongly interacting system formed
in heavy-ion collisions, the dynamical fluctuations of net-charge, fluctuations
of the mean transverse momentum, mean multiplicity and balance functions are
related to the fundamental properties of the system, hence they may reveal
information about the QCD phase transition. In this article, recent results on
event-by-event measurements of net-charge fluctuations, the measurement of the
balance function and mean transverse momentum fluctuations are discussed.
