Ufasoft

LAN/Wi-Fi/IM sniffer Captures ICQ, IRC, Email, HTTP and other messages. Allows to capture all network traffic even in switched LAN. Sniffer supports parsing of following protocols: IP, TCP and many others.

P2P Messenger is secure Instant Messaging client, working by Peer-to-Peer technology. It is fully decentralized and does not require any servers. Supports public-key cryptography

A program that allows to connect to any Internet service through a chain of SOCKS or HTTP proxies to hide the actual IP address. It also possible to work with a programs that are not designed to support SOCKS protocol directly.