blackc2004

This plugin will let you track which pages your logged in users are viewing. It logs username, ip, datetime, refere and url viewed. This newest version adds a basic graphical represnation of the users and what they have viewed. You can also filter by user.

UserTracker

This plugin will let you track which pages your users who are logged in are viewing. It logs the username, ip, datetime, referer and url viewed.

pixeline

Ever found yourself in the situation where you updated a series of plugins with no apparent issue, only to find out a few days later that something went terribly wrong… But what? Which plugins did i upgrade? Until now, you had to rely on your own note taking or memory.
This plugin keeps track of all changes made to your wordpress structure: core, network, plugins and options, for now. Themes will come soon.
Since version 2.0.0, the log can be exported as .csv.
Please <a href="https://wordpress.org/extend/plugins/wp-changes-tracker/" rel="ugc">rate the plugin</a> if you like it. 
Thanks, 
<a href="http://www.pixeline.be" rel="nofollow ugc">pixeline</a>
<h4>Usage</h4>
Nothing special. Activate the plugin and you’re done.
<h3>Credits</h3>
Special thanks to toscho for <a href="http://wordpress.stackexchange.com/questions/53413/deactivated-plugin-hook-get-the-name-of-the-plugin/53414" rel="nofollow ugc">putting me on the right tracks</a>
Thanks also to: 
– This plugin template : http://soderlind.no/archives/2010/03/04/wordpress-plugin-template/ 
– the jquery plugin: dataTables _ http://datatables.net/
Long live open source, Heil to the helpful souls!

WP Changes Tracker

Maintain a log of all themes, plugins and wordpress changes.

UserTracker vs WP Changes Tracker