A collection of community-developed metadata exporters that conform to the Dataverse exporter service provider interface (SPI) (1.0.0 first released with Dataverse 5.14, 2.0.0 released with Dataverse v6.0).
Documentation of the exporter SPI is available under Advanced Installation and Metadata Export.
As discussed in the guides you can download an example (for Dataverse 6.0+): MyJSON exporter jar.
Community members are encouraged to contribute to the documentation, add crosslinks, and create additional exporters beyond the single simple example provided today.