GNU libmicrohttpd is a small C library for embedding HTTP server functionality into other applications. It is reentrant, fast, supports HTTP 1.1, and permits listening on multiple ports. The API is simple and still powerful enough to allow programmers to use the entire HTTP feature set. SSL/TLS support is available as an option.
Dnsupdate creates DNS tables from a hosts file and the dnsupdate configuration file. It can be used to update or maintain the DNS tables. Hosts and aliases are added dynamically. Supports BIND 8 or higher. It has been tested on Sparc Solaris 8 and i386 FreeBSD 4.2 platforms. And should be easily portable to other platforms.
Tenable Nessus is a world-leader in active vulnerability scanners. It features high-speed discovery, configuration auditing, asset profiling, sensitive data discovery, and vulnerability analysis of your security posture. Nessus scanners may be distributed throughout an entire enterprise, inside DMZs, and across physically separate networks. It is free of charge for personal use in a non-enterprise environment.
Neohunt is an enhanced variant of hunt, a multiplayer game in which you run around a maze and shoot your friends before they shoot you. It is also an artifact of an earlier age, to be used either as nostalgia (if you remember the eighties) or as an example of how much better things are today (if you don't).
YpFw is a frontend to ipfw and dummynet. It was developed to ease the setting and managing of ipfw rules and dummynet pipes on FreeBSD. It features a curses text interface, which allows the user to add/delete rules, update/clear rules counters, and add/delete/configure pipes. It is not meant as a replacement to ipfw; the user will need to understand ipfw and dummynet rules and syntax.
SpamAssassin Flagging Milter is a Sendmail milter daemon for Unix systems. It sends email to Spamassassin and then modifies the headers based on the results provided by Spamassassin. It adds a Spam or NonSpam entry in the headers, which client programs can then use to help filter junk. This program is based on another program, milter-spamd: http://www.benzedrine.cx/milter-spamd.html.