Ettercap - Ettercap is a suite for man in the middle attacks on LAN.
HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
tcpdump - tcpdump is a common packet analyzer that runs under the command line.
SiteSucker - SiteSucker is a Macintosh application that automatically downloads Web sites from the Internet.
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
Offline Explorer - MetaProducts Offline Explorer is a Windows NT/2000/XP/2003/Vista program that allows you to...