Prosper is a LaTeX class for writing transparencies. It is written as an extension of the seminar class by Timothy Van Zandt. Prosper offers a friendly environment for creating slides for both presentations with an overhead projector and a video projector. Slides prepared for a presentation with a computer and a video projector may integrate animation effects, incremental display, and so on. Various visual styles are supported (including some that mimic PowerPoint) and others are being contributed.