There is now a dedicated site for the JAFO plugin at jafo.de. JAFO organises photo competitions in a club: set briefs, submit photos by web or email, have them scored by members and a jury, evaluate, and discuss them at the club night. Across the season this becomes the annual ranking automatically.
The feature pages walk through the whole process and every function in detail. For a demo on a real competition, get in touch at info@jafo.de.