  This paper presents a brief review of the newly developed \emph{Extended
Electrodynamics}. The relativistic and non-relativistic approaches to the
extension of Maxwell equations are considered briefly, and the further study is
carried out in relativistic terms in Minkowski space-time. The non-linear
vacuum solutions are considered and fully described. It is specially pointed
out that solitary waves with various, in fact arbitrary, spatial structure and
photon-like propagation properties exist. The {\it null} character of all
non-linear vacuum solutions is established and extensively used further.
Coordinate-free definitions are given to the important quantities {\it
amplitude} and {\it phase}. The new quantity, named {\it scale factor}, is
introduced and used as a criterion for availability of rotational component of
propagation of some of the nonlinear, i.e. nonmaxwellian, vacuum solutions. The
group structure properties of the nonlinear vacuum solutions are analyzed in
some detail, showing explicitly the connection of the vacuum solutions with
some complex valued functions. Connection-curvature interpretations are given
and a special attention is paid to the curvature interpretation of the
intrinsic rotational (spin) properties of some of the nonlinear solutions.
Several approaches to coordinate-free local description and computation of the
integral spin momentum are considered. Finally, a large family of nonvacuum
spatial soliton-like solutions is explicitly written down, and a procedure to
get (3+1) versions of the known (1+1) soliton solutions is obtained.
