Allows users to change their nickname styling in the User CP (based on group permissions). Should work in both 1.8 and 1.6. More info in the download link and on the github page.
Installation:
Get Plugin Library (check Requirements section for more info). Upload everything from upload folder to your forum root (where index.php, forumdisplay.php etc. are located). Install and activate plugin in ACP -> Configuration -> Plugins. Configure it.
Templates troubleshooting:
User CP - add {$GLOBALS['nav_style_your_nick']} to the usercp_nav_profile template.