Online Booking System is best source earn income from your site by offering services. If you are offering services through WordPress powered sites then here is Top 7 Online Booking System Scripts/Plugins For WordPress :
1) BookingWizz for WordPress :
BookingWizz for WordPress – is long awaited addon which will allow you to integrate bookingwizz into your wordpress site without any hassle. Plugin will install bookingwizz for you (bookingwizz must be purchased and uploaded to your site root) with a click and will seamlessly integrate whole system interface into your wordpress site, you will not have separate login to manage your events/bookings/calendars. BookingWizz for WordPress has 2 widgets and 4 shortcodes at the moment.
2) Booking System PRO (WordPress Plugin) :
This Plugin will help you to easily create a booking/reservation system your WordPress website or blog for any purpose.
3) JS-Appointment calendar reservation manager :
The JS-Appointment WordPress plugin is a professional automation tool allowing your guest the freedom to book appointment on your website 24 hrs a day which in turn will free up your valuable time.
4) Reservations Calendar :
The Reservations Calendar plugin allows users to ‘rent’ a time interval on specific dates using PayPal.
5) JS Restaurant table reservation plugin :
The online restaurant ordering system for small to large businesses. More and more people are going online to search for food in their area rather then using the yellow pages. JS Restaurant WordPress plugin is the perfect online solution for those restaurants,with table reservation system and menus management,where customers can place orders. Our script is addressed to the restaurants owners but it also can be used for other products such as bars, equipment etc. The JS-Restaurant wordpress plugin has been tested on WordPress ver 3.2.1. and WordPress 3.3
6) JS Property real estate wordpress plugin :
JS Property is a powefull WordPress plugin for creating and managing real estate business site, with option to sell or rent properties (with availability calendar and booking form), agent profile support for agencies or single owner, frontend access, Paypal gateway, individual contact form. Packed full of features (15 widget, 3 sliders, list page,details page), it gives you possibilities that no other real estate system for WordPress does. Try it out, you will be impressed.
7) PayPal File Download WordPress Plugin :
PayPal File Download for WordPress is the easiest way to sell digital content. Easily sell and automatically deliver e-books, PDFs, ZIPs, and any other kind of file to your customers—with built in IPN , email delivery, and download expiry.
Integrating directly with PayPal Website Payments Standard with a built-in seamless IPN system, your users will be able to hit Buy Now, check out, and instantly have your digital goods delivered to their email inbox in seconds.