It's a modification of PicoCMS 2.0 with intended purpose of using it as a wiki Engine.
What's added:
- Reworked Clutter theme
- Reworked edit plugin with passwords & recovery
- Option to integrate wiki into Wordpress themes. For that include wordpress.php into your Wordpress theme and modify .htaccess to redirect all requests to Wordpress installation.
You can check this modification integrated into my Wordpress website here.