Trawex is a satisfied user and ally of Travel Booking System open source software projects. We support open source projects that power Trawex, but we actively release & maintain new Travel Booking System Open Source projects that are public releases of software that we has put together internally. One of the most financially rewarding business models in the Internet is supplying hotel booking, flight reservations rental car services, etc. Having a business website script will for certain cost a lot, because of the appeal of the business. At the same time, you can really get reasonable or even some very good online booking or reservations PHP script, if you realize where to look at.