averageradical

Non-technical summary: Track incoming referrer and write it to any hidden form field with the identifier “referrer” (this can be created in Contact Form 7, for example; see below). Also if the WordPress site redirects from HTTP to HTTPS, this plugin also overrides the redirect to add the referrer to the https URL.
Technical details: This plugin runs client-side JavaScript in every page in HEAD and if there isn’t a session cookie with the name “referrer”, then it writes a session cookie with the name “referrer” and the value of either document.referrer, or if that’s empty, the URL-encoded value of window.location.href. There is another client-side JavaScript in every page before which writes the value of the “referrer” cookie to any INPUT with the ID “referrer”, if it exists.
When integrating with Contact Form 7, add a hidden input field such as the following:
<pre><code>[hidden referrer id:referrer]
</code></pre>
And then add to the Mail’s Message Body:
<pre><code>Referrer: [referrer]
</code></pre>
If you’re just integrating this with HTML, just add this to any form:
<pre><code><input type="hidden" id="referrer" name="referrer" />
</code></pre>

track-incoming-referrer

Track incoming referrer and write it to any hidden form field with the identifier "referrer".

scribu

versusbassz

When displaying a single post, you might want to show links to the previous and next posts in the same category.
That’s fine; WordPress let’s you do this with <code>previous_post_link()</code> and <code>next_post_link()</code>.
But what if that post is in multiple categories?
What if the user came to that post from a tag page or from an author page? Wouldn’t it make more sense to display previous / next posts from that particular set?
Well, you can do this with a similar pair of functions, provided by this plugin: <code>previous_post_smart()</code> and <code>next_post_smart()</code>.
Here’s how it works:
Whenever a visitor goes to an archive page (category, tag, date, author, search etc.), the plugin notes which archive it is in a browser cookie.
Then, if the visitor goes to a single post from that archive page, the plugin generates the prev / next links based on the information in the cookie.
Links: <a href="http://scribu.net/wordpress/smarter-navigation" rel="nofollow ugc">Plugin News</a> | <a href="http://scribu.net" rel="nofollow ugc">Author’s Site</a>

Smarter Navigation

I have been looking into code this functionality myself but have been not able to make it work properly than i came across this plugin and it worked liked a charm on just installing it.



Worked like a charm

Generates more specific previous / next post links based on referrer.

track-incoming-referrer vs Smarter Navigation