A cross-platform media player with many features such as frame timing, MKV chapters and subtitles. It is a responsive video player with minimal layout customizable with themes. A good alternative media player to VLC since it can handle almost all the media formats as VLC, but using much less resources.

One of the most popular video/audio players around; plays most audio and video formats (using ASCII characters) in the shell; provides a GUI for graphical visualization.

Lightweight graphical PDF visualizer; strong key-based control; fast and accurate rendering.

"X11 image viewer aimed mostly at console users" (cit.); with no fancy GUI, it is controlled via commandline arguments and configurable key/mouse actions.

A library and a program to display JPG, PNG, GIF or BMP images in the terminal using ASCII characters.

Software suite to create, edit, compose, or convert bitmap images; it handles many file formats (including PDF and SVG) and provides processing tools to "resize, flip, mirror, rotate, distort, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves".

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

High-performance Linux log viewer and analyzer.

SolarWinds® Loggly® makes Linux log monitoring and analysis simple with a powerful platform that can correlate all your logs for a unified view of your environment. It offers cloud-based log aggregation with an agentless approach for collecting logs.

You can use simple scripts to configure your Linux files and directories to send logs to Loggly. Alternatively, you can also use the syslog daemon to send Linux system logs to Loggly for file and application log monitoring. A major advantage of Loggly is that it has a highly intuitive interface with simpler workflows. Unlike other tools, you don’t have to spend countless hours in the initial setup. Loggly automatically archives your older logs on AWS S3 buckets for compliance.

This tutorial describes 3 different command-line image viewers to display images in Terminal itself in Unix-like operating systems.

Zathura is a highly customizable and functional document viewer. It provides a minimalistic and space saving interface as well as an easy usage that mainly focuses on keyboard interaction.

Plugin based document file visualizer (PDF, DejaVu, PS); strongly key-based control.

Master PDF Editor is а complete application for editing PDF documents and PDF files for Mac OS X, Windows and Linux

Xournal is an application for notetaking, sketching, keeping a journal using a stylus. It is free software (GNU GPL) and runs on Linux (recent distributions) and other GTK+/Gnome platforms. It is similar to Microsoft Windows Journal or to other alternatives such as Jarnal, Gournal, and NoteLab.

The renderer in MuPDF is tailored for high quality anti-aliased graphics. It renders text with metrics and spacing accurate to within fractions of a pixel for the highest fidelity in reproducing the look of a printed page on screen.

MuPDF is also small, fast, and yet complete. It supports PDF 1.7 with transparency, encryption, hyperlinks, annotations, searching and more. It also reads XPS and OpenXPS documents. MuPDF is written modularly, so features can be added on by integrators if they so desire.

I'm generating a PDF document with pdflatex (more precisely, latexmk invoked from TexMaker 3.4. My LaTeX install is TeXLive 20120719). I can read the document fine in Okular and Gmail's attachment preview, but a colleague that runs Acrobat Reader on Windows reports: "There was a problem reading this document (131)".