ip proxy

lets you to calculate every aspect of your subnet configuration.

WinSocks - Socks Proxy Server

proxy server HTTP, HTTPS, SOCKS v4/4a/5, FTP, POP3, UDP/TCP portmapping

Send your mail through http proxy but not only the mail proxy

Ping IP and display current public and internal IP.

Block all communications with selected IP and IP ranges with ease.

Store a list of Ip Configurations that you can use to change your ip on the fly.

Lets you find your IP address, resolve hostnames to IP addresses using the DNS.

The free web debugging proxy for any browser, system or platform.

TekSIP is a SIP Registrar and Stateless SIP Proxy for Windows.