KenMorico

Professional Opt-in gently floats in from the bottom of the page without angering your users – causing them to bounce. Users can read your content and not get bombarded with obtrusive pop-ups asking for an email address before reading anything you have to offer. Professional Opt-in is for the new slow-sell economy.
<ul>
<li>Free and quick! Get it working in just 1 minute.</li>
<li>Customizable promo text and Call-to-Action button text.</li>
<li>Appears when users scroll down the page – after they are interested.</li>
<li>For short pages, call to action appears after 30 seconds.</li>
<li>Works on mobile and desktop browsers – looks exactly the same.</li>
<li>Uses the powerful and proven promo text – call-to-action combination. </li>
<li>Triggers special call-to-action events in Google Analytics (if available).</li>
<li>Use on all pages or a combination of homepage, posts, pages, or archive / categories.</li>
</ul>
Related Links:
<ul>
<li><a href="http://kenmorico.com/professional-opt-in" title="Professional Opt-in Plugin for WordPress" rel="nofollow ugc">Plugin Homepage</a></li>
<li><a href="http://kenmorico.com/professional-opt-in" title="Professional Opt-in FAQ" rel="nofollow ugc">Plugin FAQ</a></li>
<li><a href="http://kenmorico.com/professional-opt-in" title="Professional Opt-in Support Forum" rel="nofollow ugc">Support Forum</a></li>
</ul>

Professional Opt-in

Drive users to your opt-in landing page without driving them crazy.

Mirco Babini

Adds a Settings > Options link to the options.php page. 
If you wanna contribute, pull requests on <a href="https://github.com/mirkolofio/wp-options" rel="nofollow ugc">github.com</a>.
Developed by <a href="http://www.mircobabini.com/" rel="nofollow ugc">Mirco Babini</a>, WordPress Consultant, Web Developer and Data Lover.

Options

and the serialized data are not visible :( nor editable. I was looking for something more like the outdated wp-options-manager



useless. Just call an existing WP function

Easily manage Wordpress Options by Settings > Options

Professional Opt-in vs Options