Dataverse, powerful and user-friendly form generator
Dataverse is a user-friendly tool for creating conversational forms which store their data in dynamic databases.
As open source / libre / free software, you can self-host it on a server, using Docker and MySQL (recommended), Postgres, or SQLite. The source is available at Gitlab.
If you don’t have a server, I can also provide Dataverse as a service via CloudVault.