The contact form Shack Forms Pro v5.1.16 (Perfect Ajax Popup Contact Form) for the websites on the basis of Joomla is ideal! CMS. The module of the contact form can display forms with pleasant animation or effect the lightbox. You can create any number of forms with an unlimited set of fields, different prototypes (11 options of prototypes are built already in) and effects. It is possible to remove in modular as the normal static module or to locate the call key modal at the edge of the page with a possibility of adhesion. In settings of extension it is possible to set up any background colors, any colors of fields and buttons, to set up effects, an insertion of any HTML-code in intervals between fields, to do sorting of fields and many other things
Info: https://www.joomlashack.com/joomla-extensions/shack-forms/