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"hmap" is a tool for fingerprinting web servers. Basically, it collects a number of characteristics and compares them with known profiles to find a closest match. The closest match is its best guess for the identity of the server.

ldapdns is a lightweight, high performance DNS server which utilizes LDAP as its backend. It was originally based on djbdns, and strives to maintain the same goals of performance, security and simplicity.

A single-server inetd, similar to Dan Bernstein's tcpserver or courier-tcpd from Courier-IMAP. This is small, and supports limiting the number of concurrent connections and refusing further connections with a configurable message.

Coro based PSGI web server.

transproxy - transparently proxy HTTP requests. This program is used with ipfw's fwd rules or Darren Reed's IPFILTER package, and is used to intercept HTTP requests and divert them to a HTTP proxy server (eg: squid), without requiring user intervention or configuration. It accepts connections on the redirected port, connects to the real proxy server, and transports data between the two sockets. The original HTTP request is modified to allow the HTTP proxy server to fetch the correct document. In most cases this doesn't cause any DNS activity. Unlike some other transparent proxy solutions, this does not require the HTTP proxy server to run on the machine itself. See /usr/local/sbin/tproxyrun for an example of how to add filter rules and start tproxy. Also see /usr/local/sbin/tproxywatch for an example of how to ensure that tproxy keeps running regardless of faults.

GeoServer is a GIS server. It is open source and it allows users to view and edit geographic data. GeoServer is a fully functional WFS-T and WMS server that follows the OGC specifications. GeoServer is a tool you can display maps on web pages, where the user can zoom and pan around. And it is used in conjunction with clients such as OpenLayers, Google Earth, UDig, GVSig and others.

Subsonic instantly transports your media to any HTTP connected device regardless of bitrate. You can stream to multiple players simultaneously. Subsonic is designed to handle very large music collections. By using transcoder plug-ins, Subsonic supports on-the-fly conversion and streaming of virtually any audio format, including MP3, OGG, WMA, FLAC, APE and more.

Net::Async::XMPP is an asynchronous XMPP client and server implementations.

JACK is a low latency audio server, written for POSIX-conformant operating systems. It can connect a number of different applications to an audio device, as well as allowing them to share audio between themselves. Its clients can run in their own processes (i.e. as normal applications), or can they can run within the JACK server (i.e. as a "plugin"). JACK was designed from the ground up for professional audio work, and its design focuses on two key areas: synchronous execution of all clients, and low latency operation.

Mail Avenger is a highly-configurable, MTA-independent SMTP server daemon. It lets users run messages through filters like ClamAV and SpamAssassin during SMTP transactions, so the server can reject mail before assuming responsibility for its delivery. Other unique features include TCP SYN fingerprint and network route recording, verification of sender addresses through SMTP callbacks, SPF (sender policy framework) as a general policy language, qmail-style control over both SMTP-level behavior and local delivery of extension addresses, mail-bomb protection, integration with kernel firewalls, and more.