KSendFax is an interface to fax packages like HylaFax, E-Fax, and mgetty+sendfax for sending facsimiles. It incorporates a built-in phonebook, but can also use the standard KDE addressbook. It features scanning of new faxes, editing/creating textual faxes directly, previewing the fax to send, user defined fax coverpages, and a filter system that lets you use more or less any file format for the documents you want fax. Everything is configurable through a convenient configuration dialog. It is, however, not intended to configure your whole fax suite, but only to provide a GUI interface for an already configured fax server package.
Snort is a network intrusion detection and prevention system. It is the most widely deployed technology of its kind in the world. It performs detection using a variety of methods including rules-based detection, anomaly detection, and heuristic analysis of network traffic. Its rules language is open source and available to the public as well.
jwhois is an Internet Whois client that contains an extensible configuration file, which defines its operation. The client supports queries to foreign hosts, either through the RFC 954 - NICNAME/WHOIS protocol, the RFC 2167 - Referral Whois 1.5 protocol, or HTTP using an external browser. Upon execution, it searches through its configuration to find the most specific whois server to query. Depending upon the reply from that whois server, it can assume the query was successfull and display the result to the user, or optionally redirect the query to another server to find more specific information.