The poster presents a computational platform for the analysis and design of hydrokinetic turbine for the exploitation of the renewable energy in marine and river currents. Digital tools are integrated into a computational suite including: (1) turbine geometry 3D modeller and automated mesh generation, (2) variable-fidelity computaitonal hydrodynamics models, (3) turbine hydrodynamic design and prediction of energy output in a real marine or river site. The tools have been in-house developed from a two-decade experience in the marine propulsion sector, and have been extensively validated for applications to marine propulsion and renewable energy systems. A distinguishing feature of the computational suite platform is the ongoing activity aimed at creating an open access to the platform tools by means of an online platform, named "OceanusLink".