For a limited time, this great app Exp Deals Hotel is free again.
This app reveals the hotel name hidden behind a Priceline.com's express deal.
It does ONLY that and does it very well. There are other websites and browser plugins designed for similar purposes, but IMO this app just blows them all away in terms of accuracy.
I choose to post this in hot deals rather than freebies as I think it deserves that.