Neil Simon

Enter an email address and available contact information is displayed:
<ul>
<li>Photo</li>
<li>Name</li>
<li>Demographic information</li>
<li>Personal interests</li>
<li>Clickable social links (LinkedIn, Twitter, Facebook, …)</li>
<li>Recent <a href="http://twitter.com/" rel="nofollow ugc">Twitter</a> updates</li>
<li>Recent <a href="http://plancast.com/" rel="nofollow ugc">Plancast</a> plans</li>
<li>Optionally, emails the displayed contact information to any valid email address</li>
</ul>
Contact information provided by <a href="http://fullcontact.com" rel="nofollow ugc">FullContact</a>.
Email services provided by <a href="http://sendgrid.com/" rel="nofollow ugc">SendGrid</a>.

RainmakerMoxie

RainmakerMoxie (BETA-limited support) is an interactive sidebar widget. Enter an email address and it displays a photo, name, social links and more.

ablancodev

Create a conversion funnel in your wordpress. 
It allows for seamless tracking and categorization of users based on their conversion states, providing valuable insights to optimize marketing strategies and enhance overall user engagement.
You can create leads manually or automatically when register new users.
Users can travel through the conversion funnel by visiting different pages.
Referrer system ready with url param.
If you need to notify them, you can use WordPress emails.

Funnel

Streamline Your Marketing: Effortlessly Navigate User Conversion Paths

RainmakerMoxie vs Funnel