ericjuden

This plugin allows you to use $_COOKIE, $_SERVER, $_SESSION, $_GET, $_POST and $_REQUEST data in a Gravity Form through the merge tags of a field. I’ve only really tested this using a hidden field.

Gravity Forms Extended Merge Tags

It's amazing how few people seem to know about this plugin. Incredibly simple, but also really helpful when using $_SESSION variables to track website visitors.
I use it to get referring website data, so I can easily store it in a $__SESSION variable. Then when the visitor fills out a Gravity Form, I can pass along the stored vars.
I crafted a Lead Source Tracking for Salesforce script that uses this plugin to pass along the details to Salesforce when a form is submitted.



Brilliantly simple

This plugin allows you to use $_COOKIE, $_SERVER, $_SESSION, $_GET, $_POST and $_REQUEST data in a Gravity Form through the merge tags of a field.

activity-log.com

Plugin will track accurate activity time on specific page, very useful for cases like content reading time, stream or video watching time, 
tracking time in LMS online learning system, working time for writing or editing elementor templates, pages editing time, post editing time and similar.
Build as extension of WinterLock functionality for Accurate Sessions Time Tracking
Features:
<ul>
<li>User time spent duration per page</li>
<li>Tracking activity time</li>
<li>Tracking working time</li>
<li>Tracking editing time</li>
<li>Tracking writing time</li>
<li>Tracking visit time</li>
<li>Tracking time on page</li>
<li>Tracking reading time</li>
<li>Tracking user time</li>
<li>Tracking elementor working time</li>
<li>Accurate session time tracking</li>
</ul>

WP Sessions Time Monitoring Full Automatic

Plugin will accurately measure all activity time per page and user like working time, reading time, watching time, sessions time for specific user on  …

Gravity Forms Extended Merge Tags vs WP Sessions Time Monitoring Full Automatic