The American Chemical Society (ACS) is one of the largest scientific organizations. Their mission is to advance the broader chemistry enterprise and its practitioners for the benefit of Earth and its people.
ChemSketch Freeware is a drawing package that allows you to draw chemical structures including organics, organometallics, polymers, and Markush structures.
Contains interactive 3D chemistry animations and structures, with supporting information, for students studying some of the most important topics in advanced school chemistry and university chemistry courses.