The official WordPress Blog Stats plugin makes integrating W3Counter with a WordPress self-hosted blog easy. The plugin adds W3Counter's real-time stats to the WordPress admin dashboard, and adds a sidebar widget for integrating the tracking code into the blog's theme.
In addition to making it easy to view your stats and add the tracking code to your blog's theme, the plugin also makes use of W3Counter's Visitor Labeling feature. Whenever someone leaves a comment on your blog, their name is stored in a cookie by WordPress to fill in the comment form on future visits.
The plugin passes on the author's name to W3Counter, where it will show up in your "Who's Online" reports instead of an IP address. Clicking on the name will show you the browsing history of that commentor on your blog.
Current Version: 2.5
Release Date: 9/10/2012
Download: Blog Stats by W3Counter at the WP Codex
After activating the plugin, click "W3Counter" under your "Settings" menu to configure it.
Add the tracking code to your sidebar by dragging the W3Counter widget into your sidebar on the "Widgets" page under the "Appearance" menu.