Here are some extra things that I thought you might be interested in. They're not that useful directly for class or materials, but could be handy or at least something to note.

Sometimes Wikipedia can be over-verbose and dull. This is a Wikipedia format that esl students might find more useful: http://simple.wikipedia.org/wiki/Main_Page

Screen Jelly – to give students a video of how to do something online: http://www.screenjelly.com/ You can record just your movements as you navigate the screen or you can record your voice at the same time so you can give directions too.

Voki - You can add an avatar to your blog with lots of websites – http://www.voki.com/  and video/Youtube to add extra info.

News – Like word clouds, this formats the news in a completely different way. The bigger the headline, the

more popular it is. http://newsmap.jp/ You can choose the news displayed on screen too.