The Gang of Four design patterns have been elegantly distilled into a quick reference guide suitable for printing on 8.5 x 11.
You can get a larger version for your office wall, too. Check out the poster size. It’s perfect for any software organization.
I’ve posted low-resolution versions of the two cards here with the author’s permission. Links to the high-res printable versions are below on the author’s website.
Jason McDonald created these high-quality reference cards. Click here to view the printable high-resolution images.