There are lots of great web-based tools which can be used to support creativity.
Take a look at the examples below, they are interactive so please add to each one, use the comments section to share ideas about ways in which they could be used. Please also add your own ideas below.
Padlet http://padlet.com/wall/lntq5m0kcbmg (click anywhere in the box to add a comment)
Google Forms can be used to collect ideas.