aircrack is an 802.11 WEP and WPA-PSK keys cracking program that can recover keys once enough data packets have been captured. It implements the standard FMS attack along with some optimizations like KoreK attacks, thus making the attack much faster compared to other WEP cracking tools. In fact aircrack is a set of tools for auditing wireless networks.
AirSnort is a wireless LAN (WLAN) tool which recovers encryption keys. AirSnort operates by passively monitoring transmissions, computing the encryption key when enough packets have been gathered.
Amap is a next-generation scanning tool, which identifies applications and services even if they are not listening on the default port by creating a bogus-communication and analyzing the responses.