1. Backbid.com passes your reservation info along to other hotels in the area that extend counteroffers, typically saving you over 20% (or getting you a better room or amenities).'
2. Tingo.com checks rates for your reservation after you book. If prices drop for any night of your stay, you get a refund.
3. Hotelsweep.com scours smaller, independent properties not listed on major online travel agencies (check TripAdvisor.com for reviews).
