There are a number of Recite CMS-specific plug-ins which are not documented in the Smarty Template Engine manual. Each of these are covered in their respective chapters, and also listed below.
{captcha}
. Output a CAPTCHA image. Refer to Adding CAPTCHA to Forms.
{container}
. Output a container. Refer to Defining Container Locations
{contentblock}
. Output page content. Refer to Defining Editable Areas
{thumbnail}
. Create a thumbnail image. Refer to Thumbnails