OpenMOIV is an object-oriented 3D multi-platform toolkit that facilitates the rendering and interaction of chemical systems. OpenMOIV is a derived product of Molecular Inventor™, and it is partially compatible with applications developed using Molecular Inventor™. Opposing to the original library, OpenMOIV is multi-platform (you can use in any platform that has a version of the Open Inventor toolkit) and independent of the windowing system. It includes a new set of functionalities to work with protein structures and rendering them with a lot of new display styles. OpenMOIV is the result of molecular visualization research of the GTI group of the Universitat Pompeu Fabra (UPF) in Barcelona (Spain). The research was done in the context of the European Union supported project Link3D.