0 wafw00f

^     ^
        _   __  _   ____ _   __  _    _   ____
       ///7/ /.' \ / __////7/ /,' \ ,' \ / __/
      | V V // o // _/ | V V // 0 // 0 // _/  
      |_n_,'/_n_//_/   |_n_,' \_,' \_,'/_/    
                                <   
                                 ...'

it's a WAF ( Web Application Firewall ) Detect Tool in python

Source here : http://waffit.googlecode.com/svn/trunk/wafw00f.py