Topological and non topological solitons in scalar field theories Solitons emerge in various non linear systems as stable localized configurations behaving in many ways like particles from non linear optics and condensed matter to nuclear physics to cosmology and supersymmetric theories Sine Gordon model Kinks in the models with polynomial potentials Non topological solitons: Korteweg de Vries system Op3q non linear sigma model Baby Skyrmions Q balls Skyrmions Hopfions