Best Free Software for Linux

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This list of Best Free Software for Linux now includes 156 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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This category is maintained by senior editor Jojo Yee. Registered members can contact the editor with comments or suggestions by clicking here. You can visit the Google+ profile page of Jojo Yee here.

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Ostinato is an open-source, cross-platform network packet crafter/traffic generator and analyzer with a friendly GUI. It aims to be "Wireshark in Reverse" and become complementary to Wireshark:
"... Xonotic is a free and fast-paced first person shooter. It combines addictive, arena-style gameplay with rapid movement and a wide array of weapons ...": "... Kernel Panic is a game about computers. Systems, Hackers and Networks wage war in a matrix of DOOM ...":
NeonView - lightweight image viewer:
Textroom is a free full screen rich text editor developed with especially writers in mind:
"... Vifm is a ncurses based file manager with vi like keybindings. If you use vi, vifm gives you complete keyboard control over your files without having to learn a new set of commands ...":
Rapid Photo Downloader - photo and video downloader: Features: * Generates meaningful, user configurable file and folder names * Downloads photos and videos from multiple devices simultaneously * Backs up photos and videos as they are downloaded * Is carefully optimized to download and back up at high speed * Easy to configure and use * Runs under Gnome, KDE and other Linux desktop environments * Available in thirty languages * Program configuration and use is fully documented
Everpad - Evernote client well integrated with linux desktop: Client has: * unity lens * indicator applet * unity launcher Client support: * notes * tags * notebooks * resources * places * en-* tags
Cube 2: Sauerbraten is a free multiplayer & singleplayer first person shooter, the successor of the Cube FPS: Other games from the same developer:
Bombermaaan - A classic Bomberman game with multiplayer support: Unvanquished is an open-source first-person shooter combining real-time strategy elements with a futuristic, sci-fi setting: Mega Mario: The Bub's Brothers: Cubosphere: FreeOrion is an open source, turn-based space empire and galactic conquest (4X) computer game:
Open Sonic is an open-source game based on the "Sonic the Hedgehog" universe. It introduces a different style of gameplay called cooperative play, in which it's possible to control 3 characters simultaneously. Unlike most similar games, Open Sonic provides a greater level of interaction between the player and the levels. It's more than just a jump'n'run; the user must come up with some strategy in order to get through the levels: LinCity-NG is a city simulation game. In the game, you are required to build and maintain a city. You can win the game either by building a sustainable economy or by evacuating all citizens with spaceships:
King Arthur's Gold Free Version - 2D Strategy:
Citadel Features: * Email, calendaring, address books, bulletin boards, instant messaging, and more … all in one tightly integrated server package. Unlike other open source groupware systems, all of Citadel's data stores are built-in. All that tedious mucking about with dependencies and config files is a thing of the past. * High-performance, multiprotocol, multithreaded server engine * Wiki and blog engines built in. Citadel is a collaboration server and a content management system! * Web browser, telnet/SSH, local client software accessible * Standards-compliant e-mail built in: IMAP, POP3, ESMTP * Group calendaring and scheduling (WebDAV, GroupDAV, and Kolab-1 compatible) * Built-in listserv (mailing list server) * Integrated server-side mail sorting and filtering. Users can choose between an easy-to-use web based rules editor, or the power of writing complex scripts using the industry standard Sieve language. * Support for push e-mail and mobile devices * Database-driven, single-instance message store * Built-in full text index for fast searching * Authenticated SMTP for remote email submission * Multiple domain support * Built-in integration with perimiter email filtering technologies such as Realtime Blackhole Lists (RBL's), SpamAssassin, and ClamAV antivirus * Server-to-server replication. Users in any number of domains can be spread out across any number of Citadel servers, allowing you to put data where you need it, and enabling infinite horizontal scalability. * Web-based access to email, calendars, and everything else through a powerful AJAX-style front end * Very strong support for “public folders” and message forums. * Built-in instant messenger service * SSL/TLS encryption for all protocols * Citadel is true open source software. Unlike other groupware servers, it isn't a cut-down version of an expensive proprietary “pro” version. We make our very best work available to everyone on the same terms. 100% of our code is covered by the GNU General Public License (GPL3).
Mari0 - Mario game with Portal gun mechanics: Ortho Robot is a perspective based puzzle game, where you flatten the view to move across gaps. Your objective is to reach the ending green block (either by standing directly on it or standing on it in relative space). For some extra challenge, try to collect all coins and perfect your time, steps and number of warps: Ever wondered how Pacman would be like with physics? No? Well, it's revolutionary. This mashup of "Not" and "Pacman" puts The Pac and the Ghosts in a in a Pacworld cage, at mercy of gravity and the level's shape, controlled solely by you. Ghosts still don't like you very much, so you should be careful to make Pacman avoid them:
xvidcap is a screen capture enabling you to capture videos off yourX-Window desktop for illustration or documentation purposes:
Red Rogue - a side-scrolling roguelike-like computer game:
Extreme Tux Racer is an open-source downhill racing game starring Tux, the Linux mascot: FooBillard - free 3D OpenGL billard game: BomberClone: KBounce is a single player arcade game with the elements of puzzle. It is played on a field, surrounded by wall, with two or more balls that move about in the field bouncing off of walls. The player can build new walls, decreasing the size of active field: LBreakout2: Pipewalker - This is a puzzle game in which you need to combine the components into a single circuit: connect all computers to a network server, bring water to the taps, etc: Berusky is a 2D logic game: Crack Attack!: Regnum Online:
Update: PipeWalker now added.
LBreakout2 has been in the list. BillardGL is included as it's rated higher than FooBilliard in this review. Will look at many others that you've suggested.
Evince with Hand tool: "... This PPA provides slightly enhanced Evince document viewer that pan scroll mode (like "Hand tool" in Adobe Reader) is added. It's probably suitable for touch panel based computers ...":
Red Eclipse is a single-player and multi-player first-person ego-shooter, built as a total conversion of Cube Engine 2, which lends itself toward a balanced gameplay, completely at the control of map makers, while maintaining a general theme of agility in a variety of environments: SuperTuxKart is a Mario Kart-like arcade racing game featuring the Linux mascot Tux:
DMDE Free Edition is a powerful software for data searching, editing, and recovery on FAT and NTFS disks: