Caldera Forms plugin that was sold in 2020 to Ninja Forms and will be phased out by the end of this year.
It’s a shame as it was one of the few form builders, who offered more features beyond creating forms. Other plugins developers could connect with it and create sophisticated processors for the submitted form data and integrating other systems.
A mention of Caldera Forms.
https://gutenbergtimes.com/?view_newsletter=60e591d3230c29954a54801f7a56f4ac&id=19419&mc_cid=ec101ded3e&mc_eid=dbe22eef3c