BKchem

BKchem is a lightweight Windows application whose purpose is to help users draw chemical structures.

It sports a clean and straightforward interface that allows you to set up the dedicated parameters with minimum effort.

BKchem gives you the possibility to design structural formulas using several preset tools, such as double or triple lines, dotted or interrupted lines, or opting for a free drawing style.

The program enables you to drag and drop the objects to any area of the working environment, insert chemical compounds or molecules (e.g. benzene, cyclopropane, cyclobutane, purine, thiophene), as well as add atoms and symbols (e.g. plus, minus).

Other important features worth mentioning are represented by the possibility to embed text messages and brackets, rotate a molecule around its geometrical center in a 2D or 3D mode, and align molecules on a horizontal or vertical display.

You can insert rectangles, squares, ovals, circles, and polygons, draw polylines, embed numbers and wavy lines, specify a molecule name and ID, customize a bond in terms of order, position, and width, and select the atom color, valency, and symbol.

What’s more, you can import data from MOL, CML, or XML files, undo or redo your actions, perform basic editing operations (cut, copy, paste), align objects (top, bottom, left, or right), and bring objects to the front or send them to the back.

Last but not least, the tool offers support for the Simplified Molecular-Input Line-Entry System (SMILES), and lets you save the structural formulas to SVG, ODF, PNG, PDF, CDML, or other file formats.

BKchem offers a handy set of parameters for helping users design structural formulas.