My own forms toolkit

Is it possible, and if it is than how, to create my own toolkit for Flowable Forms?

When I say toolkit, I mean on custom flowable extension which would contain remaining form object (i.e. text fields, number fields with some new possibilities etc.) and new objects like columns and rows so I would be able to make some kind of a design on form since I dont want to have each field in different row?

Kind regards,