Currently the full source code is available of the Delft3D-FLOW, Delft3D-MOR, Delft3D-WAVE, Delft3D-WAQ (DELWAQ) and Delft3D-PART (DELPAR, Particle Tracking) engines under GPLv3 conditions. The source code of the post-processing tool QUICKPLOT is also available. We aim to release the source code of the other graphical user interface programmes in 2019/2020.