The "Keep Calm and..." meme is based off a series of World War 2 posters drawn up by the UK Ministry of Information in order to boost the morale of the British people by passing on a message from King George VI. The poster is out of copyright and therefore can be freely reproduced and mashed up.
Those are copyrighted... you can only get modified versions or buy them if you pay for copyrighted rights
Memes
keep calm and eat cookies
Do I really need to explain?
Thanks for the Memes was created on 2003-06-09.
Keep Calm and Karey On - 2013 TV was released on: USA: 2013
Nothing. Maybe the comfort of his fellow soldiers, but they didn't have anything to keep them calm in trenches.
Keep Calm and Twerk On - 2014 was released on: USA: 15 January 2014 (internet)
Memes copying other memes: http://on-memetics.blogspot.com/2011/07/memicry.html
You can get them at hot topic
i calms me down
The cast of Keep Calm and Carry On - 2010 includes: Alex Disdier as Trent Maytag