Take a look at jotform.com
You can setup a free account for 5 forms and upto 100 submissions per month. The software is very easy to use, along with being quite robust, and has Xara listed as an option to generate the code for your site. You simply create a placeholder and copy and paste the code from jotform. One of the companies I work with has over 80 Xara sites using JotForms. We researched about half a dozen options before selecting JotForms.
The forms work just fine with multiple Xara variants. I do modilfy the codes slightly for the different size variants. And when I say modify I mean post the code in the placeholder and simply change the size numbers for height and width.
Be happy to assist you if you need more help.
Bookmarks