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This list of Best Free Software for Linux now includes 150 apps in various categories. Among a plethora of freeware products, we have selected some gems in each category and added them to the list with clear and brief descriptions of each app.

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by Panzer on 17. December 2014 - 10:17  (120138)

"... Decibel Audio Player is a GTK+ open-source (GPL) audio player for GNU/Linux. It is very straightforward to use thanks to a clean and user-friendly interface ...":
http://decibel.silent-blade.org/

Pogo Music Player (fork of Decibel Audio Player):
https://launchpad.net/pogo

Lollypop is a GNOME music player:
http://gnumdk.github.io/lollypop/

"... Potamus is a lightweight GTK-based audio player with a simple interface and an emphasis on high audio quality ...":
http://offog.org/code/potamus/

"... qutebrowser is a keyboard-focused browser with with a minimal GUI. It’s based on Python, PyQt5, QtWebKit and free software ...":
https://github.com/The-Compiler/qutebrowser

by Panzer on 17. December 2014 - 9:07  (120135)

wasavi - VI editor for any web page (extension for Chrome, Opera and Firefox):
http://appsweets.net/wasavi/

by need3 on 15. December 2014 - 6:24  (120118)

Thanks a lot for this list of Linux software.
Yesterday, using probably the wrong application, I was taking hours to sync two folders, then after reading here I learned about FreeFileSync, that finished the job in a few minutes, awesome.

By the way, I see that Truecrypt is still listed, with a link pointing to http://www[dot]truecrypt[dot]org/downloads [Mod: bad link obfuscated], which is currently considered suspicious. Looking for alternatives, so far I tried tcplay, not very user friendly being text only, but it works well with Truecrypt archives.

by Jojo Yee on 15. December 2014 - 6:48  (120119)

Welcome your comment Need3.

TrueCrypt has now been delisted and replaced with AES Crypt. Give it a try and see how it goes.

by Panzer on 12. December 2014 - 8:36  (120088)

"... Keryx is a free, open source application for updating Linux. The Keryx Project started as a way for users with dialup, or low-bandwidth internet to be able to download and update packages on their debian based distribution of linux. Mainly built for Ubuntu, Keryx allows users to select packages to install, check for updates, and download these packages onto a USB portable storage device. The packages are saved onto the device and are then taken back to the Linux box that it originated from and are then installed ...":
https://launchpad.net/keryx

"... apt-offline is an Offline APT Package Manager for APT based systems, i.e. mostly Debian and Debian derived distributions. apt-offline can fully update/upgrade your disconnected Debian box without the need of connecting it to the network ...":
http://apt-offline.alioth.debian.org/

by Panzer on 11. December 2014 - 8:47  (120080)
by Panzer on 9. December 2014 - 8:46  (120052)

gifify - convert any video file to an optimized animated GIF:
https://github.com/vvo/gifify

Peru is a tool for including other people's code in your projects:
https://github.com/buildinspace/peru

By highlighting changes, icdiff can show you the differences between similar files without getting in the way:
http://www.jefftk.com/icdiff

by Panzer on 8. December 2014 - 11:25  (120043)

"... KA Lite is open-source software that mimics the online experience of Khan Academy for offline situations. Running KA Lite as a local server, you can watch Khan Academy videos, do Khan exercises, and track student progress -- all without needing an Internet connection ...":
https://learningequality.org/ka-lite/

by Panzer on 4. December 2014 - 10:14  (119958)

"... Sage is a free open-source mathematics software system ... It builds on top of many existing open-source packages: NumPy, SciPy, matplotlib, Sympy, Maxima, GAP, FLINT, R and many more ...":
http://www.sagemath.org/index.html

"... FreeMat is a free environment for rapid engineering and scientific prototyping and data processing. It is similar to commercial systems such as MATLAB from Mathworks, and IDL from Research Systems, but is Open Source ...:"
http://freemat.sourceforge.net/

"... Mutate is a simple launcher ... Be more productive with hotkeys, keywords and file actions at your fingertips ...:"
https://github.com/qdore/Mutate

Sigram - a different telegram client:
http://labs.sialan.org/projects/sigram

Silicon Empire is a set of tools that burn, copy, backup, manage and … your optical disc:
http://labs.sialan.org/projects/silicon

FullRecall is a software that can help you memorize knowledge for lifelong periods with the minimum time investment:
http://fullrecall.com/

"... Betty is a friendly English-like interface for your command line. Don't remember a command? Ask Betty ...:"
https://github.com/pickhardt/betty

Systemback - simple system backup and restore application with extra features:
https://launchpad.net/systemback

by Panzer on 3. December 2014 - 9:58  (119947)

Vimprobable is a lean stand-alone web browser optimised for full keyboard control (inspired by Vimperator):
http://sourceforge.net/projects/vimprobable/

by Panzer on 3. December 2014 - 9:49  (119946)

"... Active@ KillDisk Linux Console is an easy-to use & compact utility that allows to sanitize storage media using more than 23 international data sanitizing standards. It erases permanently all data on Hard Disks, Camera Flash Cards & USB disks, SCSI storage & RAID disk arrays even in parallel mode (several disks at the same time) ... It comes with a bootable media, based on TinyCore Linux, however it can be launched under any Linux family operating system: Debian, Ubuntu, Oracle, OpenSUSE … in console (non-graphical) mode ...":
http://www.killdisk.com/linuxfree.htm

by Panzer on 3. December 2014 - 9:37  (119945)

NetMauMau - server for the popular card game Mau Mau:
https://github.com/velnias75/NetMauMau

"... MenuLibre - an advanced menu editor that provides modern features in a clean, easy-to-use interface. All without GNOME dependencies, so even lightweight systems can benefit from the sanity that MenuLibre offers. MenuLibre is your one-stop shop for menus in Linux, whether you use Gnome, LXDE, XFCE, or Unity ...":
http://smdavis.us/projects/menulibre/

by Panzer on 2. December 2014 - 9:55  (119931)

Plover - open source stenography software:
https://github.com/openstenoproject/plover

With StenoTutor you can learn to stenotype on your QWERTY keyboard:
https://github.com/caru/StenoTutor

by Panzer on 29. November 2014 - 10:49  (119899)

CoverGloobus is a desktop coverart&media controller that can also display lyrics to the currently playing song:
http://gloobus.net/coverglobus/

by Panzer on 28. November 2014 - 11:05  (119892)

Polipo is a small and fast caching web proxy:
http://www.pps.univ-paris-diderot.fr/~jch/software/polipo/

dtach is a program that emulates the detach feature of screen:
http://sourceforge.net/projects/dtach/

LilyTerm - a light, but functional terminal emulator:
http://lilyterm.luna.com.tw/

by Panzer on 27. November 2014 - 9:28  (119866)

Gramps is a genealogy program for Linux, Windows, Mac, and FreeBSD that allows you to easily build and keep track of your family tree:
https://gramps-project.org/

OpenMW is a new and modern engine based on the one that runs the 2002 open-world RPG Morrowind:
https://openmw.org/en/

"... Treesheets - the ultimate replacement for spreadsheets, mind mappers, outliners, PIMs, text editors and small databases ...":
http://strlen.com/treesheets/

by Panzer on 27. November 2014 - 9:14  (119865)

Subsonic is a free, web-based media streamer, providing ubiquitous access to your music:
http://www.subsonic.org/

Gwibber is an open source microblogging client:
http://gwibber.com/

Cheese uses your webcam to take photos and videos, applies fancy special effects and lets you share the fun with others:
https://wiki.gnome.org/Apps/Cheese

Xournal is an application for notetaking, sketching, keeping a journal using a stylus:
http://xournal.sourceforge.net/

by Panzer on 27. November 2014 - 8:51  (119864)

zpaq is a free and open source (GPL v3) incremental, journaling command-line archiver:
http://mattmahoney.net/dc/zpaq.html

Rofi - a popup window switcher:
https://davedavenport.github.io/rofi/

gobar - minimalistic X status bar in pure Go:
https://github.com/KenjiTakahashi/gobar

charted - A charting tool that produces automatic, shareable charts from any data file:
http://www.charted.co/

Pithos is a native Pandora Radio client:
http://pithos.github.io/

by Panzer on 26. November 2014 - 10:19  (119851)

Skippy-XD is a full-screen task-switcher:
https://code.google.com/p/skippy-xd/

HexChat is an IRC client based on XChat:
https://hexchat.github.io/

"... Bombono DVD - DVD authoring program with nice and clean GUI ...":
http://sourceforge.net/projects/bombono/

mooedit text editor:
http://sourceforge.net/projects/mooedit/

"... Lime Text is a powerful and elegant text editor primarily developed in Go that aims to be a Free and open-source software successor to Sublime Text ...":
http://limetext.org/

"... MonoDevelop enables developers to quickly write desktop and web applications on Linux, Windows and Mac OS X. It also makes it easy for developers to port .NET applications created with Visual Studio to Linux and Mac OS X maintaining a single code base for all platforms ...":
http://www.monodevelop.com/

by Panzer on 21. November 2014 - 9:37  (119783)

"... Photobomb - Hello, Media Peace Officer #S1493. As you know by now, a bomb was detonated in the city square only minutes ago. Our algorithms have been scraping social media to collect photos leading up to the event. We have narrowed the list of suspects to 6 in the vicinity who weren't wearing their ID trackers.

Scour the social media timeline and place the photos in the scene to paint the suspects. Determine the location of the bomb and identify the guilty suspect. Time is of the essence, #S1493. The people want justice. You have 2 minutes ...":
http://milkbaggames.itch.io/photobomb

amarok-1.4 - an attempt to maintain the classic amarok, based on 1.4.10:
http://sourceforge.net/projects/amarok-14/

by Panzer on 21. November 2014 - 9:11  (119781)

Phototonic is an image viewer and organizer:
http://oferkv.github.io/phototonic/

"... Lyvi is a simple command-line lyrics (and more!) viewer for various audio players ...":
http://ok100.github.io/lyvi/

Voyager is a Image browser in Vala and Gtk+3:
http://alphaos.tuxfamily.org/forum/viewtopic.php?f=8&t=1022

"Light" is a program to control backlight controllers:
https://github.com/haikarainen/light

by Jojo Yee on 23. November 2014 - 9:36  (119807)

Thanks Panzer for the various suggestions.

Phototonic has now been added and this makes it the 150th application selected on this list.

by Panzer on 21. November 2014 - 9:09  (119780)

Snebu is an efficient incremental snapshot style client/server disk-based backup system for Unix/Linux systems:
http://www.snebu.com/

Ayr is a Bash script which lets you manage menus of application launchers, which can be either executables or desktop files:
http://appstogo.mcfadzean.org.uk/linux.html#ayr

Cleps-Video-Player:
https://github.com/yungtrizzle/Cleps-Video-Player

" ... Playalong - A simple, yet useful music player for musicians ...":
https://github.com/hildensia/playalong

by Panzer on 21. November 2014 - 8:59  (119779)

"... jumanji is a highly customizable and functional web browser based on the libwebkit web content engine and the gtk+ toolkit. The idea behind jumanji is a web browser that provides a minimalistic and space saving interface as well as an easy usage that mainly focuses on keyboard interaction like vimperator does ...":
https://pwmt.org/projects/jumanji/

"... whistle aims to be a very minimalistic and basic audio player ...":
https://github.com/ap0calypse/whistle

"... Demlo organizes your music library automatically and dynamically. It runs a chain of user-defined scripts using variables such as tags and file properties. This way it yields virtually unlimited customization power to the user ...:"
http://ambrevar.bitbucket.org/demlo/

Luminescence - plugin-based minimalistic web browser:
http://www.mg0.fr/luminescence/

by Panzer on 21. November 2014 - 8:53  (119778)

"... 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 ...":
https://pwmt.org/projects/zathura/

sxiv - simple X image viewer:
https://github.com/muennich/sxiv

by Panzer on 20. November 2014 - 9:33  (119745)

"... emelFM2 ... It is a file manager for UNIX-like operating systems. It uses a simple and efficient interface pioneered by Norton Commander, in the 1980s. The main window is divided into three parts, described as "panes" or "panels". Two of those (side-by-side or top-to-bottom) show the contents of selected filesystem directories. The third pane, at the bottom of the window, shows the output of commands executed within the program. Those panes can be resized, and any one or two of them can be hidden and unhidden, on request. A built-in command-line, toolbar buttons or assigned keys can be used to initiate commands ...":
http://emelfm2.net/

by Panzer on 19. November 2014 - 10:50  (119711)

"... Worker is a two-pane file manager for the X Window System on UN*X. The directories and files are shown in two independent panels supporting a lot of advanced file manipulation features. The main focus is to make managing files easy with full keyboard control, also assisting in finding files and directories by using history of accessed directories, live filtering, and access to commands by using the keyboard ...":
http://www.boomerangsworld.de/cms/worker/

"... 4Pane is a multi-pane, detailed-list file manager for Linux. It is designed to be fully-featured without bloat, and aims for speed rather than visual effects. In addition to standard file manager things, it offers multiple undo and redo of most operations (including deletions), archive management including 'virtual browsing' inside archives, multiple renaming/duplication of files, a terminal emulator and user-defined tools ...":
http://www.4pane.co.uk/index.html

"... Dired is a special mode for editing directory trees, both local and remote. Thus, it resembles traditional "file managers ...":
http://pu.inf.uni-tuebingen.de/users/sperber/software/dired/

by Panzer on 19. November 2014 - 10:27  (119710)

CLI Companion is a Terminal that lets you store commands and create a 'command dictionary.':
https://launchpad.net/clicompanion

"... Tilda is a Linux terminal taking after the likeness of many classic terminals from first person shooter games ... where the terminal has no border and is hidden from the desktop till a key or keys are pressed ...":
http://sourceforge.net/projects/tilda/

Nuvola Player runs a web interface of cloud music services in its own window and provides integration with a Linux desktop (multimedia keys, system tray, media player applets, dock menu, notifications and more):
http://nuvolaplayer.fenryxo.cz/home.html

Aqualung music player:
http://aqualung.factorial.hu/

by Panzer on 14. November 2014 - 9:33  (119616)

Link for Gnome Do redirects you to some unwanted page ... Fix needed ...

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