For printing: Save mind map using the 'Image Only' link and print. The images are made for A3 size [11x17] @ 300dpi.

Some of the mind maps are very big. To view / print them, I recommend using the 'Image Only' option.

Majority of the mind maps are created using XMind (http://www.xmind.net/) - Java Application.

Edraw MindMap (http://www.edrawsoft.com/freemind.php) is a very good alternative to Java based XMind.