Q: Is it possible to create clone?
A: Yes.
Q: Which technology i should use to achieve this?
A: You can use what that site is using (see below).
From the site's html source:
<script src="http://jotform.com/js/prototype.js" type="text/javascript"></script>
<script type="text/javascript" src="http://jotform.com/js/simple.js"></script>
<script type="text/javascript" src="http://jotform.com/js/textshadow.js"></script>
<script src="http://jotform.com/js/builder.js" type="text/javascript"></script>
<script src="http://jotform.com/js/effects.js" type="text/javascript"></script>
<script src="http://jotform.com/js/dragdrop.js" type="text/javascript"></script>
<script src="http://jotform.com/js/jotform.js" type="text/javascript"></script>
<script src="http://jotform.com/dimmer/dimmingdiv.js" type="text/javascript"></script>
<script src="http://jotform.com/editor/wysiwyg.js" type="text/javascript"></script>
Http header:
Server: Apache/1.3.34 (Debian) mod_gzip/1.3.26.1a PHP/4.4.4-8+etch6 mod_ssl/2.8.25 OpenSSL/0.9.8c
X-Powered-By PHP/4.4.4-8+etch6
Summary:
Javascript framework: Prototype and proprietary
Server-side: php 4.4.4 on Apache 1.2.34
Server-OS: Debian Linux
Database: My guess is mySql