Despite the numerous books and talk about Tcl, I've never seen any actual Tcl for two reasons.

1) It seems to be used in GUIs for biological and medical sciences only, which is distant from my field.

2) There are absolutely no code samples on the surface of tcl.tk or on this article, and after clicking "Random Page" a statistically significant number of times I found that only 1/6 pages have any Tcl code at all. Even the tutorial for the language itself has a strangely low code-to-text ratio. It makes me wonder that the developers are wanting to hide the code due to shame, or the CEO bosses behind the project only feel that advertising features of the implementation, applications, and the language's popularity are important, while in fact these are relatively useless to speculating and beginner Tcl programmers.