If you are a WordPress user who also uses Piwik to track your website traffic, you're going to be interested in this one! This is a simple plugin
AltStats provides an easy-to-read summary of visitor activity on your WordPress site.
This developer-oriented WordPress plugin extends Andrew Nacin's Log Deprecated Notices to show a link in the WP 3.3+ Toolbar.
Logs data about iframe clicks: can log clicks from Google AdSense, Amazon, Facebook, Twitter. Logs URL, IP, browser, and size of the clicked iframe.
Log variables and view the results in your admin interface
Loggy is simple express server for remote logging with REST API and WordPress plugin.
An extensive, customisable, fully featured user tracking plugin.
Logs errors with full information to an Elastik Ticket System. Errors can be tracked and emails can be sent to devs from there.
LogStore is a 'meta' plugin that allows other plugins to log data easily.
Provides logging and debugging data via e-mail and FirePHP.
MouseTrace allows you to watch your website visitors in real-time, see every mouse movement, click and scroll. Integrates with existing analytics serv
Improved search tools and template functions including Google-like search result snippets (on-the-fly contextual abstract), search statistics and hit-
Display log messages during plugin and theme development on the console in Safari and Firefox (with Firebug) browsers.
Timber is a general-purpose error-logging and alert system for WordPress.
Adds shortcodes for important blog stats like pagerank, alexa, technorati, RSS subscriber count, google backlinks and more.
Adds a sidebar widget to display Traffic Number. You need a 10 character Widget Code to use it.