GNU TeXmacs is a text editing platform which is specialized for scientists. It is ideal for editing structured documents with different types of content. It has robust support for mathematical formulas and plots. It can also act as an interface to external mathematical programs such as R and Octave. TeXmacs is completely extensible via Guile.

Kakoune is a code editor heavily inspired by Vim, as such most of its commands are similar to Vi's ones, and it shares Vi's "keystrokes as a text editing language" model. Kakoune has a strong focus on interactivity, most commands provide immediate and incremental results, while still being competitive (as in keystroke count) with Vim.

Parinfer is a plugin for Kakoune, Vim, Neovim and Emacs that infers parentheses and indentation. This library can be called from other editors that can load dynamic libraries.

GNU TeXmacs is a text editing platform which is specialized for scientists. It is ideal for editing structured documents with different types of content. It has robust support for mathematical formulas and plots. It can also act as an interface to external mathematical programs such as R and Octave. TeXmacs is completely extensible via Guile.

Mogan is a scientific structural text editor, a fork of GNU TeXmacs.

juCi++ is a small IDE designed especially towards libclang with speed, stability, and ease of use in mind.

It supports autocompletion, on-the-fly warnings and errors, syntax highlighting, and integrates with Git as well as the CMake and Meson build systems.

QEmacs (for Quick Emacs) is a very small but powerful editor. It has features that even big editors lack:

• Full screen editor with an Emacs look and feel with all Emacs common features: multi-buffer, multi-window, command mode, universal argument, keyboard macros, config file with C-like syntax, minibuffer with completion and history.

• Can edit files of hundreds of Megabytes without being slow by using a highly optimized internal representation and by mmaping the file.

• Full Unicode support, including multi charset handling (8859-x, UTF8, SJIS, EUC-JP, ...) and bidirectional editing respecting the Unicode bidi algorithm. Arabic and Indic scripts handling (in progress).

• WYSIWYG HTML/XML/CSS2 mode graphical editing. Also supports Lynx like rendering on VT100 terminals.

• WYSIWYG DocBook mode based on XML/CSS2 renderer.

• C mode: coloring with immediate update. Emacs like auto-indent.

• Shell mode: colorized VT100 emulation so that your shell work exactly as you expect. Compile mode with next/prev error.

• Input methods for most languages, including Chinese (input methods come from the Yudit editor).

• Hexadecimal editing mode with insertion and block commands. Unicode hexa editing is also supported.

• Works on any VT100 terminals without termcap. UTF8 VT100 support included with double width glyphs.

• X11 support. Support multiple proportional fonts at the same time (as XEmacs). X Input methods supported. Xft extension supported for anti aliased font display.

• Small! Full version (including HTML/XML/CSS2/DocBook rendering and all charsets): 200KB big. Basic version (without bidir/unicode scripts/input/X11/C/Shell/HTML/Dired): 49KB.

GNU Moe is a powerful-but-simple-to-use text editor. It works in a modeless manner, and features an intuitive set of key-bindings that assign a degree of severity to each key; for example, key combinations with the Alt key are for harmless commands like cursor movements while combinations with the Control key are for commands that will modify the text. Moe features multiple windows, unlimited undo/redo, unlimited line length, global search and replace, and more.

A Kakoune / Neovim inspired editor, written in Rust.

FeatherPad is a lightweight, Qt-based text editor, offering features like syntax highlighting, tabbed interface, and customizable settings.

Mg (mg) is a GNU Emacs style editor, with which it is "broadly" compatible. This is a portable version of the mg maintained by the OpenBSD team.

Lite XL is derived from lite. It is a lightweight text editor written mostly in Lua. It aims to provide something practical, pretty, small and fast easy to modify and extend, or to use without doing either.

The aim of Lite XL compared to lite is to be more user-friendly, improve the quality of font rendering, and reduce CPU usage.

Manuskript provides a rich environment to help writers create their first draft and then further refine and edit their masterpiece. With Manuskript you can:

• Grow your premise from one sentence, to a paragraph, to a full summary,

• Create characters,

• Conceive plots,

• Construct outlines (Outline mode and/or Index cards),

• Write with focus (Distraction free mode),

• Build worlds,

• Track items,

• Edit and re-organize chapters and scenes,

• View Story line,

• Compose with fiction or non-fiction templates and writing modes,

• Import and export document formats such as HTML, ePub, OpenDocument, DocX, and more.

Additionally Manuskript can help in many more ways with a spell checker, markdown highlighter, frequency analyzer, and automatic save in plain text file format.

mle is a small, flexible, terminal-based text editor written in C. Notable features include: full Unicode support, syntax highlighting, scriptable rc file, macros, search and replace (PCRE), window splitting, multiple cursors, and integration with various shell commands.

Libconfig is a simple library for manipulating structured configuration files. This file format is more compact and more readable than XML. And unlike XML, it is type-aware, so it is not necessary to do string parsing in application code.

dos2unix is a tool to convert line breaks in a text file from Unix format to DOS format and vice versa.

txt2tags is a document generator. It reads a text file with minimal markup and converts it to multiple formats.

odt2txt is a command-line tool which extracts the text out of OpenDocument Texts, as produced by OpenOffice.org, KOffice, StarOffice and others.

odt2txt can also extract text from some file formats similar to OpenDocument Text, such as OpenOffice.org XML (*.sxw), which was used by OpenOffice.org version 1.x and older StarOffice versions. To a lesser extent, odt2txt may be useful to extract content from OpenDocument spreadsheets (*.ods) and OpenDocument presentations (*.odp).

utf8proc is a small C library that provides Unicode normalization, case-folding, and other operations for data in the UTF-8 encoding.

csvdiff is a diff tool to compute changes between two CSV files. It can compare CSV files with a million records in under 2 seconds. It is specifically suited for comparing CSV files dumped from database tables. GNU Diff is orders of magnitude faster for comparing line by line. csvdiff supports

• Selective comparison of fields in a row

• Specifying group of columns as primary-key to uniquely identify a row

• Ignoring columns

• Several output formats including colored git style output or JSON for post-processing

Enca (Extremely Naive Charset Analyser) consists of libenca, an encoding detection library, and enca, a command line frontend, integrating libenca and several charset conversion libraries and tools.

ack is a tool for finding text inside files. It is designed for hackers and programmers by being fast, ignoring VCS directories, letting a user easily specify file types, match highlighting, Perl-Compatible Regular Expressions, and being faster to type than grep.

The drm_tools package contains the following commands:

accudate

An extended version of the "date" program that has sub-second accuracy.

binformat

Format complex binary data into text.

binload

Load data into a binary file using simple commands from the input.

binorder

Sort, merge, search, retrieve or generate test data consisting of fixed size binary records.

binreplace

Find or find/replace in binary files.

binsplit

Split test data consisting of fixed size binary records into one or more output streams.

chardiff

Find changes between two files at the character level. Unlike "diff", it lists just the characters that differ, so if the 40,000th character is different only that one character will be shown, not the entire line.

columnadd

Add columns of integers, decimals, and/or times.

datasniffer

A utility for formatting binary data dumps.

dmath

Double precision interactive command line math calculator.

extract

Extract and emit data from text files based on character or token position.

execinput

A utility that reads from STDIN and executes each line as a command in a sub-process.

indexed_text

A utility for rapid retrieval of text by line numbers, in any order, from a text file.

mdump

Format binary data.

msgqueue

Create message queues and send/receive messages.

mbin

dtmbout

Multiple buffer in and out. Used for buffering a lot of data between a slow device and a fast device. Mostly for buffering streaming tape drives for use with slower network connections, so that streaming is maintained as much as possible to minimize wear on the tape device.

pockmark

Corrupt data streams - useful for testing error correction and data recovery.

tarsieve

Filter, list, or split a tar file.

utf-8-lineseparator provides a tool to efficiently check text files for valid UTF-8 use and to report which line endings they use.