Download ACD/ChemSketch Freeware
ACD/ChemSketch Freeware is a software that you can use to easily draw almost any chemical structure such as organics, organometallics, polymers and Markush structures. This program is very useful to educational purposes. The features include to draw structures in 2D or render in 3D from any angle, draw reactions and reactions schemes, calculate reactant quantities, predict LogP for individual structures. The new edition has an improvement on it's interface and in it's structure representation. You can also search for structures in the built-in dictionary of more than 165,000 systematic, trivial, trade names and many more features that you will find. It supports Windows XP/NT/2000 and it's free to try.