In order to help promote their awesome CMS, Concrete5 will give you stickers for free.
All you need to do is visit the promotional page on the Concrete5 website and fill in you mailing address and they will send them to you anywhere in the world.
Having stickers is pretty nice but it is better when you stick them on stuff. So over a few days I went around Hampshire sticking stickers to things to spread the word. I took some photos of my efforts and sent them into Concrete5 and they were mentioned on the weekly "Totally Random" podcast.