Release of main features of SHAPE. SHAPE (SHape Analyser for Particle Engineering) is an open-source software to implement morphological characterisation of three-dimensional particles. Particle morphology is characterised in its three main aspects, namely form, roundness and roughness (surface texture). SHAPE is built using an object-oriented structure, where each Particle is an object, aiming to keep tidy data-structures and easy access to each attribute of the analysed particles.