| AjaxAgent | Agent to return a JSON-string used by AJAX. |
| BinaryAgent | Agent to display binary data (e. g. images). |
| FaultAgent | Agent to display a toplevel error page. |
| HtmlAgent | Agent to display a HTML-page. |
| HtmlmailAgent | Agent for generating a HTML-mail message. |
| TextmailAgent | Agent for generating a simple text-mail message. |