The iClicker has a lot of users here at UVM.
- student unit is low cost (about $30)
- student uses AAA batteries, easily replaced
- faculty receiver is cross platform (Macintosh, Windows. Not sure
- works with any software
- note: clickers here are purchased or rented by the student.
Other options include
- uses webhosting for polling
- allows text imput
- e.g. http://www.polleverywhere.com/