Wikipedia Chemical Structure Explorer

(Caution! it will take about 10-20 seconds to load the data. Even from localhost, it takes about 5 seconds to start up.)

It's an interactive explorer of the chemical structures in Wikipedia. You can sketch a structure in the upper-left, and have it search for structures which contain that as a substructure, or search for structures which are similar to the drawn structure. All of this is done in the browser.

In the middle left you can search by name. In the bottom left it gives an overview of the search results. The right side shows information about the structure, including its Wikipedia pages.

All this is done interactively in the web browser. It requires only static files, plus a connection to Wikipedia. I cloned the repo and started my own server with "python -m SimpleHTTPServer 8000".

I read about this in the paper "Wikipedia Chemical Structure Explorer: substructure and similarity searching of molecules from Wikipedia" at http://www.jcheminf.com/content/7/1/10 .