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AUCTeX 'AUCTeX' is a package for writing and formatting TeX files in GNU Emacs and XEmacs. It supports various TeX macro packages including AMS-TeX, LaTeX, Texinfo, ConTeXt, and docTeX (short for writing LaTeX packages with the doc style or the ltxdoc class). AUC TeX lets you run TeX/LaTeX and other LaTeX-related tools, such as a output filters or post processor, from inside Emacs. You can browse through the errors TeX reported, while it moves the cursor directly to the reported error, and displays some documentation for that particular error. This works even if the document is spread over several files. AUCTeX automatically indents your `LaTeX-source', not only as you write it -- you can also let it indent and format an entire document. It has a special outline feature, which helps you to get an overview of a document. It also provides a large range of Emacs macros.

AdaDoc AdaDoc is a tool for Ada 95 developers. It creates an HTML file from a package specification for documentation purposes.

Antiword Antiword is a free MS-Word reader for GNU/Linux, RISC OS, and DOS. It converts the documents from Word 2, 6, 7, 97, 2000, 2002, and 2003 to text, Postscript, and XML/DocBook. Antiword tries to keep the layout of the document intact.

AsciiDoc AsciiDoc is a text document format for writing short documents, articles, books and UNIX man pages. AsciiDoc files can be translated to HTML and DocBook markups using the asciidoc(1) command. AsciiDoc is highly configurable: both the AsciiDoc source file syntax and the backend output markups (which can be almost any type of SGML/XML markup) can be customized and extended by the user.

AsmRef 'AsmRef' includes a menu system and search function to display data on the Linux kernel and most topics associated with x86 assembler development on GNU/Linux systems.

AutoConvert AutoConvert is an intelligent Chinese Encoding converter. It uses built-in functions to judge the type of the input file's Chinese Encoding (such as GB/Big5/HZ), then converts the input file to any type of Chinese Encoding you want. You can use autoconvert to automatically convert incoming e-mail messages. It can also optionally handle the UNI/UTF7/UTF8 encoding.

BHL BHL is an Emacs mode that lets you convert plain TXT files into HTML, LaTeX, and SGML (Linuxdoc) files. The BHL mode handles common font-styles, three levels of sections, footnotes, and any kind of lists, tables, URLs and horizontal rules. It also handles a table of contents: you can browse the toc, insert the toc where you want, and update the sections' numbers with one keystroke.

C2html 'C2html' is a program which converts C source files to highlighted html files. The produced file can be used for creating technical manuals. A highlighted source code listing is usually much easier to read.

CPlusPlusDoc CPlusPlusDoc is a C++ documentation tool that generates HTML documentation for C++ class header files. The documentation produced closely resembles the HTML documentation created by Java's "javadoc" tool, allowing developers to use one style of comments that work whether they are programming in C++ or Java.

Catdoc The program extracts text from Word files while preserving as many special characters as possible. It does not try to preserve Word formatting, but does extract readable text. A Tcl/Tk graphical viewer is included as well, and versions 0.91.2 and above include an Excel file converter.

Chgrep 'chgrep' searches the input files (or standard input if no files are named) for oldpattern and changes them to newpattern (grep doesn't support this). You can use .lock files (or another extend). It is useful in (but not limited to) mail servers.

ChkTeX ChkTeX checks for various syntactic, semantic and typographical errors in LaTeX documents, and helps the writer stay focused on the content rather than presentation or syntax of commands.

Cko 'cko' (Colored Kernel Output) is a Linux 2.4 and 2.6 kernel patch that colors kernel messages in the BSD style. If you don't like the default color (brown), you can change the value of the "color" variable and set it to whatever color you like.

Cp-tools 2 Classpath tools is a collection of tools for GNU Classpath including a documentation generation system for "javadoc" style comments in Java source (gjdoc) and a "doclet" for converting comments into GNU TexInfo source (texidoclet).

Cpp2latex 'cpp2latex' converts C++ into LaTeX either for including into existing LaTeX documents or as standalone documents. The current version (2.0) supports syntax highlighting.

Csv2latex 'csv2latex' is a file format converter that converts a well formed CSV file (like the ones exported from OpenOffice.org) to the LaTeX document format.

Cxref 'Cxref' produces documentation (in LaTeX, HTML, RTF or SGML) including cross-references from C program source code. It works for ANSI C, including most gcc extensions. The documentation for the program is produced from comments in the code that are appropriately formatted. The cross referencing comes from the code itself and requires no extra work. Documentation is produced for files, functions, variables, #include, #define, and type definitions. Cross referencing is performed for files, #include, variables, and functions.

DHEX 'dhex' is an ncurses-based hex-editor with a diff mode. It makes heavy use of colors, but is also themeable to work on monochrome monitors. It includes the Action Cartridge Search Algorithm to find specific changes.

Deplate 'deplate' is a tool for converting documents written in an unobtrusive, wiki-like markup to LaTeX, DocBook, HTML, or "HTML slides". It supports embedded LaTeX code, footnotes, citations, bibliographies, automatic generation of an index, etc. In contrast to many wiki engines, it is intended for "offline" use as a document preparation tool.

Devhelp Devhelp is an API documentation browser for GNOME 2. It works natively with Gtk-doc (System used in GTK+ and GNOME for documentating APIs) and it is possible to create books for other documentation as well. It integrates with popular editors such as Emacs.