  We discuss a general class of nonlinear mean-field Fokker-Planck equations
[P.H. Chavanis, Phys. Rev. E, 68, 036108 (2003)] and show their applications in
different domains of physics, astrophysics and biology. These equations are
associated with generalized entropic functionals and non-Boltzmannian
distributions (Fermi-Dirac, Bose-Einstein, Tsallis,...). They furthermore
involve an arbitrary binary potential of interaction. We emphasize analogies
between different topics (two-dimensional turbulence, self-gravitating systems,
Debye-H\"uckel theory of electrolytes, porous media, chemotaxis of bacterial
populations, Bose-Einstein condensation, BMF model, Cahn-Hilliard
equations,...) which were previously disconnected. All these examples (and
probably many others) are particular cases of this general class of nonlinear
mean-field Fokker-Planck equations.
