Virto Custom List Form Extender is an Ajax and Java Script based Web Part that allows quick and simple customizing of SharePoint list forms for creating, editing and viewing list items. With this web part, you can easily design your own list forms and replace the default ones with just a few clicks, and in a way that fully satisfies your specific needs and requirements.
The new component is extremely easy to install, adjust and use. Once the web part is installed, you can immediately start designing your own list forms with additional features such as allowing auto fill fields, defining default field values as well as setting up security rights to restrict the access to specific tabs and fields for particular users and user groups. An important detail is that Virto List Form Extender web part will not modify the default list forms that are stored on your SharePoint server, but rather extends the list form features and functionality on the client side, keeping the option to restore to the default forms at any time.