wpaclean is a small utility included in the aircrack-ng package that is used to clean capture files to get only the 4-way handshake and a beacon.
Airodump-ng is included in the aircrack-ng package and is used for packet capturing of raw 802.11 frames. It is ideal for collecting WEP IVs for use with aircrack-ng. If you have a GPS receiver connected to the computer, airodump-ng can log the coordinates of the discovered access points.
Aireplay-ng is included in the aircrack-ng package and is used to inject wireless frames. Its main role is to generate traffic for later use in aircrack-ng for cracking WEP and WPA-PSK keys. Aireplay-ng has many attacks that can deauthenticate wireless clients for the purpose of capturing WPA handshake data, fake authentications, interactive packet replay, hand-crafted ARP request injection, and ARP-request reinjection.