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strace is a system call tracer, i.e. a debugging tool which prints out a trace of all the system calls made by a another process/program. strace is similar to the native BSD ``truss'' utility, but it's output style is more convenient in most cases. For strace to work, procfs has to be mounted. FreeBSD does not mount it by default. For more information, man procfs.

This module uses image libraries, Python Imaging Library (PIL) by default, to generate QR Codes. A Quick Response code is a two-dimensional pictographic code used for its fast readability and comparatively large storage capacity. The code consists of black modules arranged in a square pattern on a white background. The information encoded can be made up of any kind of data (e.g., binary, alphanumeric, or Kanji symbols)

Simplestroke is a simple utility that detects mouse gestures. It currently detects twelve pre-defined mouse gestures and prints the name of the detected gesture to stdout, if any. The output can then e.g. be used in a simple shell script to execute commands. Example usages could include closing windows in i3 by drawing a Z over them or other window manipulations, or pausing your music player by drawing a left-to-right line.

ABACUS is a software system written in C++ that provides a framework for the implementation of branch-and-bound algorithms using linear programming relaxations. Cutting planes or columns can be generated dynamically (branch-and-cut, branch-and-price, branch-and-cut-and-price). ABACUS allows the software developer to concentrate merely on the problem specific parts, i.e., the separation of cutting planes, column generation, and primal heuristics. ABACUS supports the Open Solver Interface (Osi) developed by the COIN-OR (COmputational INfrastructure for Operations Research) project which means that every solver supported by OSI can be used to solve the relaxations. Moreover, ABACUS provides a variety of general algorithmic concepts, e.g., a list of different enumeration and branching strategies from which the best alternative for the user's application can be chosen. Finally, ABACUS provides many basic data structures and useful tools for the implementation of such algorithms. It is designed both for general mixed integer optimization problems and for combinatorial optimization problems. It unifies cutting plane and column generation within one algorithm framework. Simple reuse of code and the design of abstract data structures and algorithms are met by object oriented programming modules.

Partio is a library for reading/writing/processing particle files for a wide range of tools and file formats. It acts as an abstraction for the commonalities in particle models (i.e. accessing many attributes associated with an index or entity).

This module provides a simple but complete cron like scheduler. I.e this modules can be used for periodically executing Perl subroutines. The dates and parameters for the subroutines to be called are specified with a format known as crontab entry (see manpage crontab(5) or documentation of Schedule::Cron). The philosophy behind Schedule::Cron is to call subroutines periodically from within one single Perl program instead of letting cron trigger several (possibly different) Perl scripts. Everything under one roof. Furthermore Schedule::Cron provides mechanism to create crontab entries dynamically, which isn't that easy with cron. Schedule::Cron knows about all extensions (well, at least all extensions I'm aware of, i.e those of the so called "Vixie" cron) for crontab entries like ranges including 'steps', specification of month and days of the week by name or coexistence of lists and ranges in the same field. And even a bit more (like lists and ranges with symbolic names).

Florist was produced by students and faculty of the Florida State University Department of Computer Science, under contract to the US Department of Defense, Defense Information Systems Agency, as a product of the POSIX Ada Real-Time (PART) Project. When the contract was completed, in 1999, FSU turned maintenance of Florist over to Ada Core Technologies, Inc.). The latest and most complete free version is available from Adacore. FLORIST is an implementation of the IEEE Standards 1003.5: 1992, IEEE STD 1003.5b: 1996, and parts of IEEE STD 1003.5c: 1998, also known as the POSIX Ada Bindings.

This is the Jargon File, a comprehensive compendium of hacker slang illuminating many aspects of hackish tradition, folklore, and humor. Furthermore it is a dictionary converted from the original one into JIS X 4081 format (that is a subset of EPWING V1) by FreePWING. So it can be used by EPWING viewer on Unix and the other OS (e.g. Windows or MacOS). URL for this converted dictionary is

This is a port of hourglass, a synthetic real-time application that can be used to learn how CPU scheduling in a general-purpose operating system works at microsecond and millisecond granularities. - It creates very detailed map of when each Hourglass thread has access to the CPU - It supports multiple thread execution models; e.g. periodic and CPU-bound - It acts as an abstraction layer for threading, timing, and CPU scheduling functionality on Unix- and Win32-based systems

WindowLab is a small and simple window manager, based on aewm, of novel design. WindowLab maintains the illusion of direct manipulation by constraining the mouse pointer when appropriate, i.e. when a window cannot be dragged any further in one direction. It's click-to-focus, shares its window depth policy with the Amiga, and has a window resizing/reshaping method similar to that of 8 1/2 from Plan 9.