File manager written in C; rather complete in terms of features; especially lightweight and responsive.

A visual file manager, full-screen text mode application that allows you to copy, move and delete files and whole directory trees and search for files; includes an internal viewer and editor.

Image source: Wikipedia

Universal document file converter; handles input output from/to a number of formats: HTML, PDF, LaTeX, docx, odt, AsciiDoc, Markdown, Textile, just to mention a few; the quality of conversion strongly depends on the combination of input/output formats.

Command line converter from Microsoft Word to plain text; output is sent to the standard output. From the same author of xls2csv.

Simplifies the use of duplicity by keeping clean configuration files to automate the backup.

A tool to recursively scan a directory tree looking for duplicate and broken files; it outputs statistics and save the list of files in JSON format; it produce a shell script that can be inspected before running it to delete the desire files.

A set of programs to change file and directory names by editing them inplace; I find imv especially useful to edit a filename at the program prompt.

Included in util-linux, allows bulk rename of files with regex support.

A simple, fast and user-friendly alternative to find. Written in Rust.

A Commandline Tool That Offers Quick Access to Files and Directories. Fasd (pronounced similar to "fast") is a command-line productivity booster. Fasd offers quick access to files and directories for POSIX shells. It is inspired by tools like autojump, z and v. Fasd keeps track of files and directories you have accessed, so that you can quickly reference them in the command line.

Replacement for 'ls' written in Rust, with colors and several additional "views".

Aims at taking "all the hassle out of extracting archives"; allows to use one command to extract archives in different formatsl supports tar, zip, deb, rpm, 7z, rar, gz, bz2, xz; supports recursive extraction (files into file) and extracts files into dedicated directories.

A utility designed to easily clean up filenames; it replaces characters like spaces with standard equivalents; it also replace UTF-8 or Latin-1 (or CP 1252) characters with more handy ones.

Organize files in your current directory, by classifying them into folders of music, pdfs, images, etc.

"A disk usage analyzer with an ncurses interface. It is designed to find space hogs on a remote server where you do not have an entire graphical setup available, but it is a useful tool even on regular desktop systems. Ncdu aims to be fast, simple and easy to use, and should be able to run in any minimal POSIX-like environment with ncurses installed."

See Star Wars in ASCII with telnet towel.blinkenlights.nl.

A steam locomotive traverses the screen from right to left if sl is typed instead of ls.

Generates random messages fetched from a quotation database.

A program that generates a ASCII art of a cow with a bubble containing the specified message. I provide the Wikipedia link since at the moment the link to the author's homepage results to be unreachable).

ncurses program that displays the scrolling lines found in the movie The matrix.