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Screen is a full-screen window manager that multiplexes a physical terminal between several processes (typically interactive shells). Each virtual terminal provides the functions of a DEC VT100 terminal and, in addition, several control functions from the ANSI X3.64 (ISO 6429) and ISO 2022 standards (e.g. insert/delete line and support for multiple character sets). There is a scrollback history buffer for each virtual terminal and a copy-and-paste mechanism that allows moving text regions between windows.

The historical, and still very useful process-locking program. Use to make sure that your shell script is the only version of itself running on your system. There are many other creative ways to use this program.

vordog is a collection of a driver and a user space daemon for FreeBSD to leverage watchdog timer of Vortex86 SoC . vordog is also watchdog(9) compatible. It is as a timer source of watchdog(9), you can use it with watchdog(4), watchdog(8), and watchdogd(8). You can get vordog from repository with Mercurial.

Spinner is a small program that displays a little "spinning" ASCII character in the top left corner of your terminal. To make this effect it cycles through punctuation marks like this " - \ | / - \ | / ... " (try it to see). By default the character is drawn in inverse video (or your terminal's equivalent). But you can turn this off with the -i switch. It supports any terminal capable of handling VT100 style escape codes. Spinner is useful for keeping telnet and ssh links from dropping due to inactivity. Many firewalls, and some ISPs drop connections when they are perceived as idle. By having spinner running the server is constantly sending a tiny amount of data over the link, preserving the connection. Thus (for search engines) Spinner is an anti-dle, timeout preventing, background daemon process for Unix variants including Linux. - Michael L. Hostbaek mich@FreeBSD.org

Spiped (pronounced "ess-pipe-dee") is a utility for creating symmetrically encrypted and authenticated pipes between socket addresses, so that one may connect to one address (e.g., a UNIX socket on localhost) and transparently have a connection established to another address (e.g., a UNIX socket on a different system). This is similar to 'ssh -L' functionality, but does not use SSH and requires a pre-shared symmetric key.

wmcube-gdk is a modified version of wmCube that features much faster redraws, significantly lower CPU usage, ability to specify color for both flat-shaded and wireframe objects, and transparent CPU load / zoom buttons. The roll in sequence of the original wmCube has been removed.

This is GNU Stow, a program for managing the installation of software packages, keeping them separate (/usr/local/stow/emacs vs. /usr/local/stow/perl, for example) while making them appear to be installed in the same place (/usr/local). Stow was inspired by Carnegie Mellon's "Depot" program, but is substantially simpler. Whereas Depot requires database files to keep things in sync, Stow stores no extra state between runs, so there's no danger (as there is in Depot) of mangling directories when file hierarchies don't match the database. Also unlike Depot, Stow will never delete any files, directories, or links that appear in a Stow directory (e.g., /usr/local/stow/emacs), so it's always possible to rebuild the target tree (e.g., /usr/local).

XCPUSTATE is a system monitor tool. It displays user-, system-, idle-cputime in the form of a bar chart. On some systems it also monitors disk performance. It can also display information about remote hosts using the RSTAT RPC protocol, as perfmeter does.

System-tools-backends is a collection of scripts (mostly Perl) used by gnome-system-tools to perform system administration tasks.

tren is a general purpose file and directory renaming tool. Unlike commands like mv, tren is particularly well suited for renaming batches of files and/or directories with a single command line invocation. tren eliminates the tedium of having to script simpler tools to provide higher-level renaming capabilities.