Infographics are an amazing tool for teaching and learning and a great way to have students make connections between ideas they are studying and show their understanding of material in a visual manner. They allow for the presentation of a large amount of data visually and require the user to carefully consider key words and appropriateness of images.
Free Infographic creators
Easel.ly: free, lots of choice, have to create account and infographics are public
Visual.ly: similar to above, drag and drop, requires free account
Mostly free Infographic creators
Picktochart: makes nice looking, easy to use, limited features for free educational use