Xenforo
XenForo: http://xenforo.com
Configuring XenForo is pretty simple, just note that "$uri&$args" is needed for the profile tooltip to work properly.
server { server_name localhost; root html/xenforo; index index.php index.html; location / { try_files $uri $uri/ /index.php?$uri&$args; } location ~ \.php$ { fastcgi_pass 127.0.0.1:9000; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } }