BKChem 2D molecule editor

BKChem

https://en.wikipedia.org/wiki/BKChem 
http://bkchem.zirael.org/

BKChem v0.11.6 running on Mac OS X 10.4.8
Original author(s)	Beda Kosata
Developer(s)	Beda Kosata
Stable release	0.13.0 / February 23, 2009; 8 years ago
Preview release	0.14.0-pre2 / August 12, 2010; 7 years ago
Repository	bkchem.zirael.org/download/bkchem-0.13.0.tar.gz
Written in	Python, Tcl/Tk
Operating system	Windows, OS X, POSIX
Platform	Cross-platform[which?]
Type	Molecule editor
License	GNU GPL
Website	bkchem.zirael.org

BKChem is a free 2D molecule editor written in Python by Beda Kosata. As such, it is largely platform-independent. It uses Tk via Tkinter.

Major features

Structure drawn originally with BKChem
Redrawn because of W3C-invalidity (with Inkscape)

Drawing:

• Bond by bond drawing
• Straight and curved arrows
• Radicals, lone pairs and charges
• Templates for drawing common structure (users can create their own)
• Simple vector graphics using Sodipodi-Inkscape

Editing:

• Unlimited undo/redo capabilities
• Aligning, scaling and rotation (2D and 3D)

Exports to:

• SVG
• OpenOffice Draw
• PDF
• EPS (Encapsulated Postscript)
• Molfile
• PNG (with Pycairo installed)
• SMILES (Stereochemistry is not supported)
• InChI (with InChI program)

Imports:

• Molfile
• SMILES (Stereochemistry is not supported)
• InChI (Stereochemistry is not supported)

Other features:

• Searching BKChem files for a molecule or a fragment of a molecule
• Localization support (currently English, French, Czech and Polish translations are available)
• Support for user written plugins
• Validity checking
• Can be run from source with Python

External links

• Free software portal

• Official website

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BKChem is an open source 2D molecule editor written in Python. It has a wealth of features but is simple to use.

BKChem 0.13.0

Price Free to download Size 0.9MB License GNU GPL v2 Developer Beda Kosata Website bkchem.zirael.org System Requirements Python 2.5 or higher Support: FAQ, Wiki, YouTube, Savannah Project Page Selected Reviews:

Features include:

• Drawing:
• Bond-by-bond drawing
• Bond lenght and angle restrictions to assist with the drawing
• Ready to use templates of common rings
• Ability to expand common groups from abbreviated to structural form
• Support for linear formulas (such as -CH2CH(COOCH3)2)
• Radicals, charges...
• Arrows (several types - normal, retro, equilibrium, etc.)
• Rich text
• Color support
• Simple vector graphics (rectangles, circles, polygons etc)
• Editing:
• Unlimited undo and redo capabilities
• Aligning
• Scaling
• Rotation (2D, 3D)
• Aligning of molecules so that particular bond is horizontal/vertical
• Rotation of molecular fragments around bonds (conformation changes)
• Definition of personal preferred drawing style (bond lenghts, widths, colors...)
• Export:
• SVG (native data are transparently embedded into SVG file), OpenOffice Draw format, ODF (OpenOffice 2.0) format, Encapsulated PostScript, and PDF
• Basic support for both CML1 and CML2
• Molfiles
• Generation of SMILES
• Import:
• Basic support for both CML1 and CML2
• Molfiles
• SMILES (subset)
• INChI (subset)
• Localization support (currently English, French, Czech, Polish, German and Traditional Chinese translations are available)
• XML based
• Validity checking of drawn structures
• Support for user written plugins. A BKChem plugin in general consists of two main parts: a short XML file describing the plugin, and a Python script that represents the actual code
• Support for user written batch scripts
• Searching for BKChem files containing specified molecules or molecule fragment