Network Security

NetStumbler


Free Windows 802.11 Sniffer
Netstumbler is the best known Windows tool for finding open wireless access points ("wardriving"). They also distribute a WinCE version for PDAs and such named Ministumbler. The tool is currently free but Windows-only and no source code is provided. It uses a more active approach to finding WAPs than passive sniffers such as Kismet or KisMAC.






Aircrack



The fastest available WEP/WPA cracking tool
Aircrack is a suite of tools for 802.11a/b/g WEP and WPA cracking. It can recover a 40 through 512-bit WEP key once enough encrypted packets have been gathered. It can also attack WPA 1 or 2 networks using advanced cryptographic methods or by brute force. The suite includes airodump (an 802.11 packet capture program), aireplay (an 802.11 packet injection program), aircrack (static WEP and WPA-PSK cracking), and airdecap (decrypts WEP/WPA capture files).






Airsnort



WEP Encryption Cracking Tool
AirSnort is a wireless LAN (WLAN) tool that recovers encryption keys. It was developed by the Shmoo Group and operates by passively monitoring transmissions, computing the encryption key when enough packets have been gathered. You may also be interested in the similar Aircrack.





Wep0ff

Wep0ff is new tool to crack WEP-key without access to AP by mount fake access point attack against WEP-based wireless clients.
It uses combination of fragmentation and evil twin attacks to generatetraffic which can be used for KoreK-style WEP-key recovery.
This tool can be used to mount fake access point attack against WEP-based wireless clients





WEPBuster

The main part of this is the autonomous nature of the toolkit, it can crack all access points within the range in one go. Other than the the features would be those found in aircrack-ng.