John Harrison talked about his recently-published OCaml-based
automated theorem-proving textbook, "Handbook of Practical Logic and
Automated Reasoning": http://www.cambridge.org/9780521899574
He wrote his book with a practical emphasis and provided
complete, executable code implementing the methods described
CodePad lets you execute code in various languages (e.g., OCaml)
by entering it into a form using a web browser, without installing any
other software.