Travel Agency Software [closed]

Is there a web based or web integrated software available for travel agents that does the following: Lets you book rooms in a number of hotels, Book bike and/or car rentals, Book other extras, Book other activities for people like like active holidays, and can it all be done on one screen with one final bill to pay at the end?

I'm having trouble making sense of what some of the systems I've seen do. Many thanks Chris