Teaching toys

As part of our work on the IL Blackboard modules, we've been working with our e-learning staff and they have introduced to a few freely available "toys" which we're planning to try, either within the modules or just in general teaching. Many folks will already know about them, but they were new to us.  For example:

Durham Lumiere

Wallwisher allows you to pose a question or a comment on a web page and have respondents add post it notes. maybe a way to get students engaged in posting questions before a workshop. You can allow free comments or moderate them.
Poll Daddy is a neat way of quickly getting a group opinion and embeds nicely into Blackboard.
Poll Everywhere enables people to text a question or answer which immediately displays on a screen