Ok this is AtomInvoice for tindie sellers. Allows you to load a order and create a invoice in seconds. Im already working on Version 2 which will be way more awesome!
The basics is you edit the JPG image included and the config.txt to suite your needs then load the app. When ready you enter the ORDER number and press GET… The invoice will be automatically generated on the left and you can print it using the Print button.
Thats pretty simple for a V1 and helped me understand a lot. As a note there is no JSON parser used. This is all custom parsing code. No external libs or crap to install.