SecureSubmit

This plugin provides a Heartland Payment Systems Gatway addon to the Events Manager Pro plugin using our SecureSubmit card tokenization library.
Features of SecureSubmit:
<ul>
<li>Only two configuration fields: public and secret API key</li>
<li>Simple to install and configure</li>
<li>Fully maintained and supported by Heartland Payment Systems</li>
<li>Tokenized payments help reduce the merchant’s PCI exposure</li>
</ul>

Events Manager Pro SecureSubmit Gateway

SecureSubmit allows merchants to take PCI-Friendly Credit Card payments on Events Manager Pro using Heartland Payment Systems payment gateway.

Eric Daams

<a href="http://pippinsplugins.com/sugar-event-calendar?ref=3769" rel="nofollow ugc">Sugar Events Calendar</a> is an Event Calendar plugin for WordPress that allows you to easily manage events on your website.
This add-on to Sugar Events Calendar allows you to add a Ninja Forms form to your event pages, so that you can easily add registration forms. If you have one of Ninja Forms’ payment gateway add-ons installed (<a href="http://ninjaforms.com/downloads/stripe/?ref=19" rel="nofollow ugc">Stripe</a> or <a href="http://ninjaforms.com/downloads/paypal-express/?ref=19" rel="nofollow ugc">Paypal Express</a>), you can even take payment for event registrations.
This plugin requires <a href="http://pippinsplugins.com/sugar-event-calendar?ref=3769" rel="nofollow ugc">Sugar Events Calendar</a> and <a href="http://ninjaforms.com/?ref=19" rel="nofollow ugc">Ninja Forms</a>.
This plugin does not require any configuration. Once you have installed it, you will be able to add a Ninja Form when editing your event.
Requirements
<ul>
<li>Sugar Events Calendar</li>
<li>Ninja Forms</li>
<li>WordPress 3.7+ (will probably work with earlier versions, but support will not be provided for older installations)</li>
</ul>

Sugar Events Calendar – Ninja Forms Add-on

Add registrations forms for your Sugar Events Calendar events using Ninja Forms.

Events Manager Pro SecureSubmit Gateway vs Sugar Events Calendar – Ninja Forms Add-on