Prezi

Prezi is an online presentation application and a narrative tool that uses a single canvas, instead of traditional separate slides. The text, images, video or other objects are placed in a presentation infinite canvas and presented in an orderly framework presentable. The canvas allows users to create a nonlinear presentation, where they can zoom in using a visual map. You can define a path through the objects and frameworks, achieving a desired order for the user.

Link: http://prezi.com/index