Chemozart is a web-based 3d molecule editor and visualization platfrom. This application is available via chemozart.com. No installation is required and it's accsessible anytime, anywhere which makes this application a proper option for students to draw and view a 3d molecular model. It also offers calculating the force field energy of a molecule with different molecular mechanics methods, thanks to openbabel-node which is basically a port of Open Babel into Node.js.
An article about Chemozart has been published on the Journal of Cheminformatics 2015, 7:56