Digital Posters and Books
Smore
Create and share modular posters with a variety of media elements built on templates
Poster My Wall
A handy basic canvas with attractive backgrounds and collage options
Posterini
Movie poster-style templates
BigHugeLabs
Image generator goodies and several poster templates.
Mixbook
Create an online book - great for a school project (see sample in link above)
Padlet
A virtual wall that allows people to express their thoughts on a common topic easily. It works like an online sheet of paper where people can put any content (e.g. images, videos, documents, text) anywhere on the page, together with anyone, from any device.