On the conference I've talked about some entries below, we are organizing a workshot about scripting languages (Perl, Ruby, Tcl and Python --- Marty Pauley, Simon-Cozens, José Paulo Leal, Christian Reis).
We are planning to publish a book with four tutorials of these languages. Here, I invite people to post links to other tutorials, open-source, about scripting languages, with med-size content for publication (authorship is maintained, and no restrictions will be added to the tutorial).
Languages I would like to see in the book: Bash, Scheme, Haskell, PHP and others you might say.
