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xosview is a monitor which displays the status of several system parameters. These include CPU usage, load average, memory, swap space, network usage and more. Each resource is displayed as a horizontal bar which is separated into color coded regions showing how much of the resource is being put to a particular use.

Webmin is a web-based interface for system administration for Unix. Using any browser that supports tables and forms, you can setup user accounts, Apache, DNS, file sharing and so on. Webmin consists of a simple web server, and a number of CGI programs which directly update system files like /etc/inetd.conf and /etc/master.passwd.

Meld is a GNOME visual diff and merge tool. It integrates especially well with CVS. The diff viewer lets you edit files in place (diffs update dynamically), and a middle column shows detailed changes and allows merges. The margins show location of changes for easy navigation, and it also features a tabbed interface that allows you to open many diffs at once.

GasTeX is a set of LaTeX macros which allow to draw very easily graphs, automata, nets, diagrams, etc... under the picture environment of LaTeX. A picture with gastex basically consists of nodes and edges. Here are a few examples of pictures that are easily defined with gastex.

Markdown is a text-to-HTML conversion tool for web writers. Markdown allows you to write using an easy-to-read, easy-to-write plain text format, then convert it to structurally valid XHTML (or HTML). Thus, "Markdown" is two things: a plain text markup syntax, and a software tool, written in Perl, that converts the plain text markup to HTML.

MetaUML is a GNU GPL MetaPost library for typesetting UML diagrams, using a human-friendly textual notation. Here's what you can do with MetaUML (also see the FAQ): * Create UML diagrams readily usable in a LaTeX article or book. * Create independent PDF-s * Create jpeg-s, png-s etc.

This is a simple module which makes an unscientific effort at summarizing English text. It recognizes simple patterns which look like statements, abridges them, and concatenates them into something vaguely resembling a summary. It needs more work on large bodies of text, but it seems to have a decent effect on small inputs at the moment. Seamus Venasse <svenasse@polaris.ca>

FOP is the world's first print formatter driven by XSL formatting objects. It is a Java application that reads a formatting object tree conforming to the XSL candidate release (21. November 2000) and then turns it into a PDF document or allows you to preview it directly on screen. FOP is part of Apache's XML project. The homepage of FOP is

This module provides a simple, correct way to increment a Perl module version number. It does not attempt to guess what the original version number author intended, it simply increments in the smallest possible fashion. Decimals are incremented like an odometer. Dotted decimals are incremented piecewise and presented in a standardized way.

XML::TreePP module parses XML file and expands it for a hash tree. And also generate XML file from a hash tree. This is a pure Perl implementation. You can also download XML from remote web server like XMLHttpRequest object at JavaScript language.