Best Free Software for Linux

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This list of Best Free Software for Linux now includes 152 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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"... Rust is a systems programming language that runs blazingly fast, prevents almost all crashes*, and eliminates data races ...": http://www.rust-lang.org/ http://www.rust-lang.org/install.html KeePassC is a curses-based password manager compatible to KeePass v.1.x and KeePassX: http://raymontag.github.io/keepassc/
Go For It! is a simple and stylish productivity app, featuring a to-do list, merged with a timer that keeps your focus on the current task: http://manuel-kehl.de/projects/go-for-it
"... Godot is an advanced, feature packed, multi-platform 2D and 3D game engine. It provides a huge set of common tools, so you can just focus on making your game without reinventing the wheel ...": http://www.godotengine.org/wp/ http://www.godotengine.org/wp/features/
gPodder downloads and manages free audio and video content ("podcasts") for you: http://gpodder.org/ "... Newsbeuter is an open-source RSS/Atom feed reader for text terminals. It runs on Linux, FreeBSD, Mac OS X and other Unix-like operating systems. Newsbeuter's great configurability and vast number of features make it a perfect choice for people that need a slick and fast feed reader that can be completely controlled via keyboard ...": http://www.newsbeuter.org/
"... w3m is a pager and/or text-based browser. It can handle table, cookies, authentication, and almost everything except JavaScript ...": http://sourceforge.net/projects/w3m/ "... Wyrd is a text-based front-end to Remind (https://www.roaringpenguin.com/products/remind), a sophisticated calendar and alarm program. Remind's power lies in its programmability, and Wyrd does not hide this capability behind flashy GUI dialogs. Rather, Wyrd is designed to make you more efficient at editing your reminder files directly. It also offers a scrollable timetable suitable for visualizing your schedule at a glance ...": http://pessimization.com/software/wyrd/ Extcalc is a scientfic graphic calculator: http://extcalc-linux.sourceforge.net/
chkrootkit is a tool to locally check for signs of a rootkit: http://www.chkrootkit.org/ Rootkit Hunter - security monitoring and analyzing tool for POSIX compliant systems: http://sourceforge.net/projects/rkhunter/ "... hostsblock: Features: - System-wide blocking (all non-proxied connections use the HOSTS file) - Zip- and 7zip-capable (can download and process zip- and 7zip-compressed files) - Non-interactive (can be run as a periodic cronjob without needing user interaction) - Extensive configurability (allows for custom black and white listing, redirection, post-processing scripting, target HOSTS file, etc.) - Bandwith-efficient (only downloads blocklists that have been changed, uses compression when available) - Resource-efficient (only processes blocklists when changes are registered, uses minimal pipes) - High performance blocking (when using dns caching and pseudo-server daemons) - Extensive choice of blocklists included (allows user to customize how much or how little is blocked) - Redirection capability (combats DNS cache poisoning) ...": https://github.com/gaenserich/hostsblock http://gaenserich.github.io/hostsblock/
"... Anjuta DevStudio is a versatile software development studio featuring a number of advanced programming facilities including project management, application wizard, interactive debugger, source editor, version control, GUI designer, profiler and many more tools. It focuses on providing simple and usable user interface, yet powerful for efficient development ...": http://anjuta.org/
"... Telegram is a messaging app with a focus on speed and security, it’s superfast, simple and free. You can use Telegram on all your devices at the same time — your messages sync seamlessly across any of your phones, tablets or computers. With Telegram, you can send messages, photos, videos and files of any type (doc, zip, mp3, etc) to people who are in your phone contacts and have Telegram. You can also create groups for up to 200 people or send broadcasts to up to 100 contacts. As a result, Telegram is like SMS and email combined — and can take care of all your personal or business messaging needs ...": https://telegram.org/ LinSSID - graphical wireless scanning for Linux: http://sourceforge.net/projects/linssid/ Fingerprint GUI - use fingerprint devices with Linux: http://www.ullrich-online.cc/fingerprint/index.php
hledger is a computer program for easily tracking money, time, or other commodities: http://hledger.org/
"... NetworkManager is a set of co-operative tools that make networking simple and straightforward. Whether Wi-Fi, wired, bond, bridge, 3G, or Bluetooth, NetworkManager allows you to quickly move from one network to another: once a network has been configured and joined, it can be detected and re-joined automatically the next time its available ...": https://wiki.gnome.org/Projects/NetworkManager
"... Meson Player is a very convenient music player if you don't need any flashy GUI to control playback or manage playlists. You just run it and then forget about it. The player is running in background. Switching tracks, volume control, loading and saving playlists, all of this performed by using hotkeys. Therefore, you can control the player while working in any application ...": http://sourceforge.net/projects/mesonplayer/
"... pfstools package is a set of command line programs for reading, writing and manipulating high-dynamic range (HDR) images and video frames. It includes also Qt and OpenGL HDR image viewers. pfstools can be integrated with GNU Octave or matlab, so that it can serve as a toolbox for reading and writing HDR images ...": http://pfstools.sourceforge.net/ The Unidentified Flying Raw (UFRaw) is a utility to read and manipulate raw images from digital cameras. It can be used on its own or as a Gimp plug-in: http://ufraw.sourceforge.net/
Gravitation - a video game about mania, melancholia, and the creative process: http://hcsoftware.sourceforge.net/gravitation/ Primrose: http://primrose.sourceforge.net/ Cuyo: http://www.karimmi.de/cuyo/ Bastet - "evil" Tetris: http://fph.altervista.org/prog/bastet.html https://github.com/fph/bastet/ Biloba is an abstract strategy board game for 1 to 4 players. At each turn the player moves pawns on a octogonal shaped board (but squared cells) trying to remove opponent's pawns from it: http://biloba.sourceforge.net/ "... Parole is a modern simple media player based on the GStreamer framework and written to fit well in the Xfce desktop. It is designed with simplicity, speed and resource usage in mind ...": http://docs.xfce.org/apps/parole/introduction Gnome Completion-Run Utility: http://sourceforge.net/projects/gmrun/ Ario is a GTK2 client for MPD (Music player daemon). The interface used to browse the library is inspired by Rhythmbox but Ario aims to be much lighter and faster: http://sourceforge.net/projects/ario-player/ Client175 is a full featured MPD web client that provides all of the functionality of a desktop application in your favorite web browser: http://code.google.com/p/client175/ GMPC is a GTK2 frontend for Music Player Daemon: http://gmpclient.org/home "... Rompr is a music player that lets you discover more about the music you love and discover new music you don't even know yet. It is a client for the mpd and mopidy music servers ...": http://sourceforge.net/projects/rompr/ Mopidy is a Python application that runs in a terminal or in the background on Linux computers or Macs that have network connectivity and audio output: https://www.mopidy.com/
Byobu is a GPLv3 open source text-based window manager and terminal multiplexer: http://byobu.co/ "... Use ISO Master to: – Create or customise CD/DVD images – Make Bootable CDs/DVDs – ISO images are great for distributing data files, software, and demos online ...": http://www.littlesvr.ca/isomaster/ http://linux.softpedia.com/get/Desktop-Environment/File-managers/ISO-Mas... "... Gigolo is a frontend to easily manage connections to local and remote filesystems using GIO/GVfs. It allows you to quickly connect/mount a remote filesystem and manage bookmarks of such ...": http://www.uvena.de/gigolo/ eboard is a chess interface for Unix-like systems (GNU/Linux, FreeBSD, Solaris, etc.) based on the GTK+ GUI toolkit: http://www.bergo.eng.br/eboard/ "... ZynAddSubFX is a open source software synthesizer capable of making a countless number of instruments, from some common heard from expensive hardware to interesting sounds that you'll boost to an amazing universe of sounds ...": http://zynaddsubfx.sourceforge.net/ Trimage is a cross-platform GUI and command-line interface to optimize image files for websites, using optipng, pngcrush, advpng and jpegoptim, depending on the filetype (currently, PNG and JPG files are supported): http://trimage.org/
Thanks Panzer. ISO Master has now been added to the list. Trimage is good for optimizing images in bulk but I find the RIOT plugin for GIMP works better for individual images with more options.
All games below need Spring engine to run - you can download it here: http://springrts.com/ Conflict Terra is a free, open-source RTS: http://www.moddb.com/games/conflict-terra notadota – On the Edge: http://www.notadota.com/ Evolution RTS is a free an Open Source RTS game: http://www.evolutionrts.info/ "... Spring:1944 is a WWII themed game based on the open source Spring Engine. Our goal is to create four fully functional sides (US, Germany, USSR, Britain) with period-accurate units and strengths. Realism is a primary design goal, second only to creating a game that is fun and accessible to play ...": http://spring1944.org/
Gweled is a free version of a popular game called Bejeweled or Diamond Mine for GNU/Linux: http://gweled.org/ easyMP3Gain - Graphical User Interface (GUI) for MP3Gain, VorbisGain and AACGain (enables you to modify the loudness level of mp3,ogg,mp4 files): http://sourceforge.net/projects/easymp3gain/ Kadu is an open source Gadu-Gadu and Jabber/XMPP protocol Instant Messenger client: http://www.kadu.im/w/English:Main_Page "... Password Gorilla helps you manage your logins. It stores all your user names and passwords, along with login information and other notes, in a securely encrypted file. A single "master password" is used to protect the file. This way, you only need to remember the single master password, instead of the many logins that you use ...": https://github.com/zdia/gorilla/wiki SpringLobby is a free cross-platform lobby client for the Spring RTS project: http://springlobby.info/landing/index.php
Tablaunch - lightweight and cool-looking X application launchbar: http://sourceforge.net/projects/tablaunch/ SimDock is a fast and customizable dockbar: http://sourceforge.net/projects/simdock/ tabble is a small alternative X shell which presents your programs in tabs for easy launch: http://www.rillion.net/tabble/ BBDock is an application launcher for Blackbox-like window manager that allows you to create application buttons in the slit/dock: http://bbdock.nethence.com/ Solfege is an ear training program: http://www.gnu.org/software/solfege/
"... 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
wasavi - VI editor for any web page (extension for Chrome, Opera and Firefox): http://appsweets.net/wasavi/

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.

Welcome your comment Need3. TrueCrypt has now been delisted and replaced with AES Crypt. Give it a try and see how it goes.
"... 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/
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
"... 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/
"... 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
Vimprobable is a lean stand-alone web browser optimised for full keyboard control (inspired by Vimperator): http://sourceforge.net/projects/vimprobable/

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