The first generation of post-accelerated ISOL beam facilities coupled to a new generation of gamma spectrometers trigged an important experimental effort in the study of shape coexistence for short-lived isotopes using in-beam gamma ray spectroscopy. SPIRAL1 and EXOGAM in GANIL-Caen, REX-ISOLDE and MINIBALL at CERN and ISAC and TIGRESS at TRIUMF have provided in the last decade numerous spectroscopic informations of very good quality both for neutron rich and neutron deficient nuclei. In this presentation, a review of the results obtained will be presented and futures prospectives using EURISOL and AGATA will be shown.