CHEMSKETCH

              ACD/ChemSketch Freeware is a drawing package that allows you to draw chemical structures including organics, organometallics, polymers, and Markush structures. It also includes features such as calculation of molecular properties (e.g., molecular weight, density, molar refractivity etc.), 2D and 3D structure cleaning and viewing, functionality for naming structures (fewer than 50 atoms and 3 rings), and prediction of logP. 


              ChemSketch is a free download for educational use.It can be used to produce structures of organic
molecules, names of organic molecules as well as Lewis structures, 3D structures, space filling models or
ball and stick models, among other things.


              ACD/ChemSketch has been integrated into ChemSpider to allow desktop access to searching the database via structure and substructure as well as generation of predicted properties. This development exposes initial efforts to integrate popular drawing packages to the ChemSpider services.


want to download it?? 

click here: http://download.cnet.com/ACD-ChemSketch-Freeware/3000-2054_4-10591466.html

Type	Graphical object
Energy diagram
Orbitals
Distillation
DNA strand
lipids