On September 20-21 the three twin H2020 projects ExaNoDe, ExaNeSt and ECOSCALE have organized the first cross-project joint workshop focusing on Applications. The workshop was held in Trieste and hosted by Istituto Nazionale di Astro Fisica (INAF). The main goal of this two days meeting was first to present the work performed within the three projects, and then to identify possible points of cooperation in the fields of use-case applications, programming models and reconfigurable accelerators and their virtualization.