Stefano Garuti

As you know WordPress’s Registration Form is only displayed in it’s own page, and if you want to invite a user to register, the only option you have is to provide a link to the registration page. 
With this plugin you have a new widget that insert a Registration form in your sidebar. 
The new registration form supports all the hooks that the standard Registration page does, so you can use it safely even with other plugins like Registration Plus that add fields to the form.
UPDATE and NEWS at: http://www.wpmania.it/registration-widget/

Registration Widget

This plugin provides you with a new Widget that inserts the Registration Form in your sidebar (or wherever a widget-area is defined in your theme).

Nick La Rosa

There are loads of great full featured form plugins available for wordpress. Some take a little getting to know in order to get the most out of them. This plugin is not one of those, it is something simple to help physical venues create a visitor registration form with the use of a single shortcode.
Once a patron of a venue has filled out the form, they have the option to add a new guest or visit a customisable link of the venue’s choice. Entries can then be exported to CSV by the WordPress administrator with exact date along side the details added into the form.
Links to your form can be place at the entrance to a location as a requirement of entry.
Features
<ul>
<li>Simple shortcode to instantly create a form with First and Last Name, phone and Email</li>
<li>Add a custom form field, eg. “Destination Room Number” or any other information that might be handy.</li>
<li>Customise view using attributes- Google Recaptcha</li>
</ul>
How to Contribute
If you want to contribute to Simple Visitor Registration Form, you can <a href="https://github.com/n1cklarosa/WP-Simple-Visitor-Registration-Form" rel="nofollow ugc">fork the GitHub repository</a> – all pull requests will be reviewed and merged if they fit into the goals for the plugin.

Simple Visitor Registration Form

Add a simple visitor registration form to any wordpress site.

Registration Widget vs Simple Visitor Registration Form