Recently Oxygen builder added option to create your own/3rd party design sets.
You can follow this video tutorial from Oxygen Builder on how to make design sets.
One of the drawbacks here is that it only gives 1-1 connection and you everyone has to use your site key to be able to import the design set.
This process is not very smooth and doesn’t encourage users to buy your design sets.
But with Oxy Transfer Pro you can now export your design set as a zip file and sell the zip file for your design set.
And your end user can import this design set by using the Oxy Transfer Free version.
Disclaimer: We are not in any associated with Oxygen Builder and the video is property of oxygen builder.