Sugar Event Calendar is a WordPress plugin by mordauk that keeps event management incredibly simply. This is an add-on plugin for Sugar Event Calendar that lets you easily display a Gravity Forms form on the event details page.
The benefit of this add-on is that you can utilize the tremendous power of Gravity Forms to create complex event registration or attendance forms, including payment options, while keeping the event management itself extremely simple and light weight.
This plugin requires both Sugar Event Calendar and Gravity Forms.
Download: http://wordpress.org/extend/plugins/sugar-event-calendar-gravity-forms/
