BE Free
Web 2.0
Open Source
Public Domain/
Non-Profit
Embedded Secret Text
http://www.polleverywhere.com/free_text_polls/MjEwNzA1MDY5OQ
http://drop.io/r6conference
http://sourceforge.net/community/cca09/winners/
Other companies have a paid service, but they give away portions of it for . . . Do I really need to say it? Here, I'll help you, 
FR_ _.
http://urenglishteacher.blogspot.com/

Extensions and Add-Ons
http://extensions.services.openoffice.org/project/pdfimport
http://www.google.com/support/a/bin/answer.py?answer=67775
Poll Everywhere
http://www.polleverywhere.com/multiple_choice_polls/NTY5OTYxNDA0
http://drop.io/MayerBE_FREE
http://edu.glogster.com
http://www.polleverywhere.com/free_text_polls/LTIwNTkzMTQwMDk
Amy Mayer, Conroe I.S.D.
http://www.audible.com