A few free software programs to help you easily create an infographic:

Piktochart  http://piktochart.com/

Infogram   http://infogr.am/

"The ultimate key is simplicity. All you need is to drag, drop and voilà! informative yet stunning visuals can be created with just a few clicks. We at Piktochart strive to make this tool so easy for you that your infographics are created quicker than you can say "infographics"!"  - from Piktochart

More detailed tutorials can be found on Piktochart's YouTube Channel.  

"infogr.am lets you create professionally designed infographics in minutes, and the startup aims to fundamentally change the way people work with visual information online. In a similar fashion that you can snap a photo and share it on your social networks, you can now make a statement or an argument graphically and share it. An infographic can be embedded on a page or shared as a link or an image directly." - from blog.hackfwd.com