https://github.com/peekbehind/peekbehind-for-wordpress
PeekBehind for WordPress is a plugin that shows the mouse cursors of the latest visitors as ghosts layered on top of each page of your web site.
Run the unit tests in the tests/ folder using PHPUnit, and read the source code and comments to get familiar with the implementation in the code/ folder.
PHP (WordPress.org)
http://wordpress.org/
Eric Bréchemier
http://eric.brechemier.name
for
PeekBehind.com
http://peekbehind.com
MIT License for the code and documentation
LICENSE.txt