This tool is a collection of all others (aircrack , reaver , arpspoof , hamster , etc...)
what it does is that it can get the wifi password from an access point using wps protection or cpaturing the handshake between client and AP , and shows you the password .
After you connect to the AP you can do whatever you want , you can intercept http traffic from a specific ip , sniff the ssl connections , stop its internet , and many more .
I am using it on kali linux , and the tool works perfectly well .
Remember that you need a good signal to do MIM attacks , do not expect with 1 or 2 bars of wifi power to do miracles , at least 65% wifi signal strengh is needed for the tool works fine .
Give a look , and support the tool .
Official Website : http://wi-feye.za1d.com/
Download link : http://packetstormsecurity.com/files/download/122960/Wi-fEye-v1.0-beta.tar.gz