WinDump: tcpdump for Windows
Ping Tunnel - Send TCP traffic over ICMP
sctpscan.tar.gz
sctp port scanner
Scapy
powerful network shell
Wbox HTTP testing tool
neat little app for testing the responsiveness of a HTTP server
Nikto | CIRT.net
Nikto is an Open Source (GPL) web server scanner which performs comprehensive tests against web servers (security holes, unsafe cgi scripts, etc)