this sounds good except it is not for MAC, ;( - Maureen from Bookmarklet

* Search for slides containing text or phrases * Reuse slides in multiple presentations. * Catalog your slides and find by category. * Quickly build new PowerPoint presentations with existing slides * Share your Powerpoint slide library with other users. * Edit a slide once and regenerate each presentation in which it is included with the click of a button. * Edit a slide in Slidewhere and then instantly preview it as formatted by the slide master from every presentation in which the slide is included * Find and remove duplicate slides easily with SlideWhere's duplicate check screen * Create a duplicate of a slide with the click of a button * Integrated ZIP compatible backup and restore feature. * Create slides from JPG files - Maureen