ApacheProject Website /apache
The Apache projects are characterized by a collaborative, consensus based development process, an open and pragmatic software license, and a desire to create high quality software that leads the way in its field.
CentOSProject Website /centos /centos-altarch
CentOS is built from publicly available open source SRPMS provided by RedHat. CentOS conforms fully with the upstream vendors redistribution policies and aims to be 100% binary compatible. (CentOS mainly changes packages to remove upstream vendor branding and artwork).
CTANProject Website /CTAN
The Comprehensive TeX Archive Network (CTAN) provides the most complete and up-to-date TeX-related software.
CygwinProject Website /Cygwin
Cygwin is a collection of tools which provide a Linux look and feel environment for Windows. Cygwin is also a DLL (cygwin1.dll) which acts as a Linux API layer providing substantial Linux API functionality.
DebianProject Website /debian /debian-cd /debian-security Example
Debian is a free operating system (OS). Debian uses the Linux kernel (the core of an operating system), but most of the basic OS tools come from the GNU project; hence the name GNU/Linux.
Debian GNU/Linux provides more than a pure OS: it comes with many thousand packages of precompiled software bundled up in a nice format for easy installation.
FedoraProject Website /Fedora
The Fedora Project is a Red-Hat-sponsored and community-supported open source project. It is also a proving ground for new technology that may eventually make its way into Red Hat products. The goal of The Fedora Project is to work with the Linux community to build a complete, general purpose operating system exclusively from free software.
GentooProject Website /gentoo Example
Gentoo Linux is a special flavor of Linux that can be automatically optimized and customized for just about any application or need. Extreme performance, configurability and a top-notch user and developer community are all hallmarks of the Gentoo experience.
GNUProject Website /GNU
The GNU Project was launched in 1984 to develop a complete Unix-like operating system which is free software: the GNU system. (GNU is a recursive acronym for "GNU's Not Unix"; it is pronounced "guh-noo".) Variants of the GNU operating system, which use the kernel Linux, are now widely used; though these systems are often referred to as "Linux", they are more accurately called GNU/Linux systems.
HBCDProject Website /HBCD
Hiren's BootCD (HBCD) is a completely free bootable CD that contains a load of useful tools you can make use of in a variety of situations like analyzing, recovering and fixing your computer even if the primary operating system can not be booted.
KnoppixProject Website /Knoppix-CD /Knoppix-DVD
KNOPPIX is a bootable CD or DVD with a collection of GNU/Linux software, automatic hardware detection, and support for many graphics cards, sound cards, SCSI and USB devices and other peripherals. KNOPPIX can be used as a Linux demo, educational CD, rescue system, or adapted and used as a platform for commercial software product demos. It is not necessary to install anything on a hard disk. Due to on-the-fly decompression, the CD can have up to 2 GB of executable software installed on it.
LibreOffice (tdf)Project Website /LibreOffice (tdf)
The Document Foundation - Its mission is to facilitate the evolution of the OpenOffice.org Community into a new open, independent, and meritocratic organizational structure within the next few months.
LinuxMintProject Website /LinuxMint
Linux Mint's purpose is to produce an elegant, up to date and comfortable GNU/Linux desktop distribution.
openSUSEProject Website /openSUSE
The openSUSE project is a worldwide community program promoting the use of Linux everywhere. It is based on SUSE Linux.
RaspbianProject Website /raspbian
Raspbian is a free operating system based on Debian optimized for the Raspberry Pi hardware.
SageMathProject Website /SageMath
Sage is a free open-source mathematics software system licensed under the GPL. It combines the power of many existing open-source packages into a common Python-based interface.
SlackwareProject Website /Slackware
Since the beginning, the Slackware Linux Project has aimed at producing the most "UNIX-like" Linux distribution out there. Slackware complies with the published Linux standards, such as the Linux File System Standard.
UbuntuProject Website /ubuntu /ubuntu-releases (ISOs)
Ubuntu is a desktop Linux operating system, freely available with both community and professional support. Ubuntu will always be free of charge. Ubuntu is shipped in stable and regular release cycles; a new release will be shipped every six months. You can use the current stable release or the current development release. A release will be supported for 18 months. Ubuntu is suitable for both desktop and server use. The current Ubuntu release supports Intel x86 and AMD64 architectures.
VideolanProject Website /videolan
VideoLAN is a project, run by volunteers, backed-up by a non-profit organisation, which produces free and open source software for multimedia, released under the GNU General Public License. The main software is the cross-platform VLC media player.