Here is a logo i designed for the Qi (programming language) (Home page at: lambdassociates.org).
The following is Qi II design requested by Mark Tarver. The lambda is made connected.
The image is copyright © 2007 by Xah Lee. Feel free to use the logo for Qi language related things.
I hereby transfer the copyright of this design to Mark Tarver (the creator of Qi).
The logo is used at QiLang forum at: http://groups.google.com/group/qilang.
The naming Qi has to do the Chinese concept Qi (气,氣), which means life energy. (For Western functional programers, you can think of it as the Jedi's Force.)
So, the logo incorporates Chinese characteristics. The lambda, and the “i”, is meant to give a impression of Chinese calligraphy with brush strokes. The lambda is colored in dark vermilion, a common color in Taoism temples. The outline of the Q typeface is a perfect circle, and is symbolic for lisp's parenthesis (signifying its lisp origin).
Here's few Qi language sites with the mysterious force concept association: (“qilan” similar to “qigong”). A blog named “Programming Kung Fu Qi” Source programmingkungfuqi.blogspot.com.