Beherit

Lightweight and simple contact form with no additional user-unfriendly options. You can add the contact form to any page with a shortcode <code>[contact_form]</code>. Plugin is integrated with plugin <a href="https://wordpress.org/plugins/akismet/" rel="ugc">Akismet</a> and <a href="https://wordpress.org/plugins/grecaptcha/" rel="ugc">GreCAPTCHA</a> which protect against spam.

Lite Contact Form

Lightweight and simple contact form with no additional user-unfriendly options. Can be additionally protected against spam by using Akismet and Google …

wp_candyman

A simple wordpress plugin to integrate WordPress with Zoho Campaigns. This plugin will help you to insert a form in any page or post by inserting a short code ‘[zohocampaign list_key=””]’ where list_key value is the List Key for the mailing list which can be found in ‘List Tools’ tab at https://campaigns.zoho.com/home.do#contacts/list. Plugin supports the following fields in the form First Name and Email. Both are mandatory fields as they are required to create the contact in Zoho Campaigns.
You can use the various attributes in the short code to enable the different features of the plugin. For example to enable the recaptcha you can write the short code as [zohocampaign recaptcha=”enable”].
The form data will be used to insert a contact into the Zoho Campaigns. The plugin supports recaptcha in the form to stop spam. The settings page can be accessed on the left side bar. For support <a href="http://databytebank.com/" rel="nofollow ugc">visit plugin site</a>.
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Supports Contact Form 7 
 This plugin can now be integrated with Contact Form 7 plugin. Use the attribute ‘contact_form7_id’ to show a form done in Contact Form 7. For example [zohocampaign contact_form7_id=”5″] , where ‘contact_form7_id’ is the id of the form.
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Requirements:-
Plugin requires cURL php extension enabled. 
For integrating with Contact Form 7 you have to install and activate Contact Form 7 plugin.

Campaigns Integrator

A simple wordpress plugin to integrate Wordpress with Zoho Campaigns. This plugin will help you to insert a pre-built form in any page or post.

Lite Contact Form vs Campaigns Integrator