| Rank | Change | Alexa Rank | Compete Rank | Quant Rank | Name | Review / Trend Graphs / URL | Site Description |
|---|
| 1 |  3 | 2,566 | 6,577 | 4,954 | VideoLAN | www.videolan.org | Free open source multimedia software. |
| 2 | -- | 6,269 | 2,732 | 1,356 | Open Book Project | www.ibiblio.org | The Open Book Project coordinates collaboration among students and teachers for the development of high quality, freely distributable textbooks and educational materials. |
| 3 |  -2 | 7,624 | 3,195 | 2,775 | Ubuntu Forums | ubuntuforums.org | A help and support forum for Ubuntu Linux. |
| 4 | 2 | 4,718 | 4,337 | 8,436 | MySQL | www.mysql.com | The software's official homepage with news, downloads and documentation. |
| 5 | -1 | 12,319 | 5,539 | 3,855 | Ubuntu Linux | www.ubuntu.com | Ubuntu is a free, Debian derived Linux-based operating system, available with both community and professional support. |
| 6 | -3 | 15,931 | 2,316 | 8,943 | GNU Software | www.gnu.org | A listing of FTP Sites for GNU software. |
| 7 | 1 | 14,217 | 13,628 | 7,304 | Novell | www.novell.com | Engineers of the popular SUSE linux distribution. |
| 8 | 1 | 27,030 | 9,159 | 12,755 | Linux Questions | www.linuxquestions.org | A free Linux forum where Linux newbies can ask questions and Linux experts can offer advice. |
| 9 | -2 | 14,813 | 20,149 | 13,591 | Debian Packages | www.debian.org | Search for Debian official packages in any of the three branches - stable, testing and unstable - by keyword, section and other criteria. |
| 10 | -1 | 14,674 | 13,808 | 28,023 | Red Hat, Inc. | www.redhat.com | Official site; news, support, documentation, whitepapers, downloads, consulting, training, and more. |
| 11 | -- | 40,800 | 11,091 | 13,272 | Linux.com | www.linux.com | A portal from SourceForge offering news, articles, and a how to knowledgebase. |
| 12 | 4 | 38,883 | 29,505 | 11,069 | FedoraForum.org | www.fedoraforum.org | The community support forum for Fedora Core. |
| 12 | -- | 42,814 | 22,903 | 9,293 | The Gnumeric spreadsheet | www.gnome.org | Gnumeric is intended to be a replacement for a commercial spreadsheet. Part of the Gnome project. |
| 14 | 7 | 32,958 | 30,771 | 23,919 | OpenSUSE | www.opensuse.org | Official website for the community-driven, open-development version of this distro. |
| 15 | 3 | 30,485 | 27,296 | 42,311 | Fedora Project | fedoraproject.org | A Linux based operating system. Download, documentation, FAQ, and wiki. Official site. |
| 16 | -3 | 31,831 | 32,153 | 33,713 | Free Software Foundation | www.fsf.org | Dedicated to eliminating restrictions on copying, redistribution, and modifying computer programs. |
| 17 | -2 | 45,509 | 17,082 | 25,731 | Linux Forums Dot Org! | www.linuxforums.org | A community where Linux Users come for Linux Help. |
| 17 | 3 | 38,831 | 26,307 | 34,334 | APC Software Downloads | www.apcc.com | Free Linux versions of APC UPS management software. At least 4 distributions supported: Caldera, Red Hat, SuSE, Turbolinux. |
| 19 | 6 | 18,378 | 45,589 | 89,808 | Mandriva | www.mandriva.com | Firm develops Mandriva Linux. |
| 20 | -1 | 25,493 | 37,610 | 91,153 | MPlayer | www.mplayerhq.hu | A movie player for Linux. Supports reading from network, dvd, vcd, file, pipes, and v4l. |
| 21 | 10 | 39,067 | 36,617 | 44,297 | Embedded Linux Portal | www.linuxdevices.com | Wide range of Embedded-Linux topics. |
| 22 | 6 | 52,862 | 28,204 | 47,625 | CentOS | www.centos.org | CentOS is a free Enterprise-class Linux Distribution derived from sources freely provided to the public by a prominent North American Enterprise Linux vendor. |
| 22 | 8 | 47,888 | 59,101 | 18,298 | YoLinux Information Portal | www.yolinux.com | Linux tutorials, information and links. Covers topics from desktop to servers, developers to users. |
| 24 | 10 | 38,883 | 47,191 | 73,050 | The Linux Kernel Archives | www.kernel.org | This is the primary site for the Linux kernel source. |
| 25 | 7 | 43,203 | 79,666 | 22,160 | KernelTrap.org | www.kerneltrap.org | A kernel related news site with a Linux bias. |
| 26 | 3 | 52,490 | 47,487 | 44,205 | Damn Small Linux | www.damnsmalllinux.org | A business card size (50MB) Linux distribution; with description and download links. |
| 27 | -13 | 31,361 | 20,867 | 222,324 | HOWTO Index | www.tldp.org | The Linux Documentation project. |
| 28 | -2 | 87,727 | 30,332 | 30,942 | Security Enhanced Linux | www.nsa.gov | NSA research prototype made public, has modified kernel, several utilities; has enhanced security-related functions designed to show value of mandatory access controls and how such can be added to Linux; not a full OS distribution. |
| 29 | 15 | 59,663 | 40,671 | 84,154 | CTDP | www.comptechdoc.org | Contains several documents and articles about Linux. |
| 30 | 8 | 49,148 | 52,915 | 97,840 | MythTV | www.mythtv.org | A PVR with many features. |
| 31 | 44 | 50,857 | 110,111 | 35,191 | Packetstorm | www.packetstormsecurity.org | Security updates and news bulletins, mostly Linux but also NT. Provides software tips and links. |
| 32 | -9 | 70,998 | 48,277 | 80,001 | DistroWatch | www.distrowatch.com | Compares Linux distributions (major, minor, regional) in simple table format. Information such as price, support, documentation, included packages. |
| 32 | -5 | 42,563 | 46,625 | 152,733 | Samba Project | www.samba.org | SMB Server for Linux that allows a Linux machine to connect and share files with a Windows machine andor Windows-based network. |
| 34 | 12 | 3,894 | 1,483 | 0 | Linux 2.0 Penguins | www.isc.tamu.edu | The classic Tux pics, by Larry Ewing, the creator of Tux. |
| 34 | 14 | 3,119 | 2,210 | 0 | Rutgers University Student Linux User Group | ruslug.rutgers.edu | Active LUG for Rutgers students and others in the New Brunswick area. Site includes a wiki, meetings information and some other information. |
| 36 | 21 | 18,378 | 12,920 | 535,890 | Linux.org | www.linux.org | Information and resources about the Linux Operating System. |
| 36 | 20 | 2,572 | 2,461 | 0 | DerKeiler Linux Archive | linux.derkeiler.com | An real-time updated archive of interesting linux-related mailing lists and newsgroups, covering RedHat, SuSE, Debian and the Linux Kernel. |
| 36 | 13 | 4,163 | 2,080 | 0 | Linux at NC State | www.linux.ncsu.edu | Meeting information, Realm Kit for Red Hat and FAQ. |
| 39 | -17 | 70,967 | 53,798 | 81,753 | Gentoo | www.gentoo.org | The official pages for the distribution provide documentation, downloads and installation instructions, mailing-lists, forums, performance reviews and news. |
| 39 | 8 | 3,167 | 2,408 | 0 | DeCSS for Linux and DVD | www.cs.cmu.edu | Software, information and legalese. |
| 41 | 11 | 6,391 | 1,914 | 0 | Linux Kernel Mailing List Archive | www.uwsg.indiana.edu | Searchable archive of kernel development e-mail list. |
| 42 | -25 | 119,706 | 33,863 | 16,580 | OS News | www.osnews.com | News of many OSs, includes Linux. Updates daily. |
| 43 | 6 | 47,621 | 85,681 | 99,330 | Kubuntu | www.kubuntu.org | User friendly operating system based on KDE, the K Desktop Environment. |
| 44 | 5 | 79,867 | 56,639 | 81,286 | Linux Today | linuxtoday.com | News, forum, related to Open Source software and community. |
| 44 | 14 | 16,976 | 418 | 0 | Programming in C | www.cs.cf.ac.uk | A tutorial on programming UNIX System Calls and Subroutines using C by A. D. Marshall. |
| 46 | -8 | 30,243 | 50,505 | 274,522 | Rpm2html | rpmfind.net | Generates HTML pages containing information on RPM packages, including general package information, dependencies and files. |
| 46 | 9 | 40,733 | 69,099 | 180,267 | Arch Linux | www.archlinux.org | Includes project Wiki, bug tracking system and forums. Distribution has its own package management system, Pacman. |
| 46 | -9 | 38,584 | 13,137 | 442,255 | nixCraft | www.cyberciti.biz | A designed for beginners who wish to learn the basics of shell scriptingprogramming along with perlawk. |
| 49 | 33 | 37,524 | 86,839 | 152,194 | VIM | www.vim.org | Vi, one of the original editors. |
| 50 | -17 | 63,192 | 71,959 | 99,063 | Libevent | www.monkey.org | Asynchronous event notification library. The libevent API provides a mechanism to execute a callback function when a specific event occurs on a file descriptor or after a timeout has been reached. |