Prismstumbler is software which finds 802.11 (W-LAN) networks. It comes with an easy to use GTK2 frontend and is small enough to fit on a small portable system. It is designed to be a flexible tool to find as much information about wireless LAN installations as possible. Because of its client-server architecture the scanner engine may be used for different frontends.
You can download it from the following link: https://packetstormsecurity.com/files/download/34595/prismstumbler-0.7.3.tar.bz2
Source: https://packetstormsecurity.com/files/34595/prismstumbler-0.7.3.tar.bz2.html