We have just installed the NLN material for Moodle. Fantastic resource, open-source and very professional looking http://moodle.org/mod/data/view.php?d=13&rid=1786 or if you want to create your own quiz to be used as a starter or plenary use the Realtime Quiz creator, which allows you to set your questions for so many seconds per question, get all your students to login at once, you start the quiz and they all have to answer the questions as they appear on screen. Instant feed-back http://moodle.org/mod/data/view.php?d=13&rid=1036

You probably already know about the content-generator software, some of the module are free...fantastic resource.