deobfuscators+misc : http://unphp.net http://decry.pt http://ddecode.com http://github.com/tario/evalhook http://github.com/nikic/PHP-Parser
online obfuscators : http://sniffer.pp.ua/obf.php http://www.phpencode.org/ http://fopo.com.ar/ http://www.pipsomania.com/best_php_obfuscator.do
origin - http://www.pipiscrew.com/?p=1732 php-obfuscation