What are online travel agents?
Online travel agents are travel website that will provide you online booking facilities like hotels, cars etc. This kind of systems also knows as marketplace builder, who can build the website including all facilities on the website. In this owner can have a commission from the seller.
I stumbled across the one of this kind of product know as FunAway, this product is known as travel activity marketplace builder who can build your travel website.
Check the demo here – http://demo.fun-away.com/