AIM Sniffer is a handy network utility to capture and log AIM (AOL Instant Messenger) chat from computers within the same LAN. It supports not only messaging through AIM server but also direct connection messaging.
The most powerful and effetive password sniffer. Ace Password Sniffer can listen on your LAN and enable network administrators or parents to capture passwords of any network user. Currently it can capture passwords of http, ftp, smtp, pop3, telnet.
ICQ Sniffer is a handy network utility to capture and log ICQ chat from computers within the same LAN. It supports messaging through ICQ server with format of plain text, RTF, or HTML. All intercepted messages are well organized by user with buddies.
RFC Viewer is a powerful RFC browsing utility for networking program and protocol developers. It parses the original RFC file, and generates a section directory tree as well as a page index for content browsing.