I'm one of the lead developers and maintainer of Open Babel. First off, I wanted to say thanks for using OB in the new Molekel and I hope it's working well for you. I probably should have e-mailed sooner when I heard a few months ago about the MinGW problems: http://bioinformatics.org/molekel/wiki/Main/OpenBabel We're currently well on our way to releasing OB-2.1 and I'd like to make sure: * The new release works cleanly on MinGW if that's what you're using for Windows. * Any bugs you've discovered are integrated back into the OB code base. Obviously, I'd also be really thrilled to see some of your new classes and functionality into the main Open Babel codebase. Some of the changes we've been making are similar in spirit, including some work to make it easier to read and write grids like a Gaussian cube file (OBFloatGrid). I hope to talk more -- please let me know if you have any bug reports or feature requests, etc. Thanks, -Geoff