web brush - http://www.stanfy.com/dev/webbrush/
WebBrush - it is on-line multiuser web application for: creating and discussing some charts, diagrams, schemes, sketchs; discussing some ideas, projects, plans, tasks; and sharing your photos, some graphical materials. - [Read more]

Slide - http://www.slide.com/main
Instantly create Slide Shows and enjoy faster uploads! - [Read more]