Jomres is a great booking component for Joomla 2.5 and Joomla 3.0 by Vince Woll, who provides this long-term realization with ajax driven booking forms and a easy configuration, which allows also to assign certain rights for special user categories. The possibilty to develope slideshows with unlimited images is another fine feature of this extension. Also a rating system is included. Vince Woll provides the Jomres Core with web installer for free. A installation guide is also included. If you want access to the used plugins, try one of the three offered licenses. You can use it also in Joomla 1.5.