Cool products w/ behavioral econ nudges?

Hi everyone,

I could use your quick help. I’m writing a new book chapter on the application of behavioral econ and psych “nudges” in consumer products, and collecting examples to include / interview. Which ones would you suggest I add to the list? I have obvious ones like Stickk, Timeful, Opower, HelloWallet, Jawbone, Fitbit, etc, but always looking for more!

If you have ideas,  just reply to the blog post email, find me on Twitter (sawendel) or put a comment on this post?