  Superstatistics is a superposition of two different statistics relevant for
driven nonequilibrium systems with a stationary state and intensive parameter
fluctuations. It contains Tsallis statistics as a special case. After briefly
summarizing some of the theoretical aspects, we describe recent applications of
this concept to three different physical problems, namely a) fully developed
hydrodynamic turbulence b) pattern formation in thermal convection states and
c) the statistics of cosmic rays.
