Wca-certificates provides a simple way to generate podium and participation certificates for a competition using WCA Live. There are options for translating, customization of the template and uploading your own background.
The basic flow is very straight-forward:
Enter the results of the final round of an event
Synchronize in WCA Live
Refresh results in wca-scorecards (1 in the screenshot)
Select the events for which you want to print certificates (2 in the screenshot)