Emma the Emulator is a generic 16-bit CPU emulator written as an educational tool. It supports a basic instruction set, has two registers and a program counter pointing to a heap structure which can be resized at compile time, and has a basic stack (not linked to the heap in any way), a flag register, and an internal "error number" for debugging purposes. There is also a "debug" mode which adds a lot of runtime debugging information and causes the program to sleep for 1 second between operations.
MP3 Host is a CGI script that will gather, on-the-fly, a list of all media files by extension in (sub)folders and present a page for people to access the content. It has customizable options. Its output is updated at each load. It features hands free maintenance, and makes an effective MP3 server.
halttimer waits for LIRC events or SIGUSR1 and sets a timer which will initiate the shutdown sequence (via "sudo halt" by default) when the time is up. The timer's timeout decreases with each keypress by a specified amount of time. Visualization is done using an on-screen-display (OSD).
log2command was created as a sort of reverse fail2ban or cheap VPN-firewall: a machine with a closed firewall can be told, by a foreign machine, to accept connections from a specific IP. log2command then keeps track of the Web server log file and watches for inactivity from the user's IP. After an amount of time, another command is executed that can remove the user's IP from the firewall, closing down the machine again. The PHP script is a command line program that can be run in the background.
namebench finds the best DNS servers to use for your machine, benchmarks them, and outputs pretty graphs to tell you why they are optimal. It supports multiple data sources such as Alexa, your browser history, or tcpdump replays in order to generate the most relevant and individualized recommendation.