Our official order module example lives in the "om_sample" directory. Please consult this if you're implementing your own order module for Ubersmith.
Order modules contributed by the community live in their own subdirectories. If you wish to contribute one, please develop your order module within its own subdirectory, then submit a pull request. Please note that we take no responsibility for order modules contributed by the community, and make no claims as to their functionality or usability.