Looking for a free online poster/graphic maker? Canva.com is brilliant! Empowering the world to design is their motto, and they do just that. There are templates for just about all of your design needs. Here are a couple of examples.
I took the one above and created this poster to assist my folks with WIFI issues. I posted this to twitter and on our student links page. In addition to downloading the graphic, you can export as a link, and embed code. This WEB2OOL also allows you to add collaborators and complete a project together. You can also sign in with your BV Google account, one less password to remember!