Some free and open-source projects come with commercial-support. Usually a subscription based service is sold offering 24/7 helpdesks and full-time developers who help modifying the system to individual business needs. FOSS business models dual-license

Code::Blocks is a C/C++ IDE built with configurability and extensibility in mind. It is built around a plugin framework that allows it to be extended through the use of external libraries (plugins).

GNU/Linux is the more accurate name for an operating system based on the combination of GNU tools and the Linux kernel emphasizing this dependence.

GNUmed is a comprehensive scalable software solution for electronic medical practices with an emphasis on privacy protection, secure patient centric record sharing, decision support, and ease of use. It is intended to become a sophisticated decision support system that will elevate the quality of medical care that can be delivered.

Dual licensing is a business model for free and open source software. There is usually one copyleft community license such as GNU GPL and a commercial proprietary license sold for companies who do not want to release their source-code of the application derived from it. FOSS business models commercial-support

a project which aims at producing Open Source 3D drivers for nVidia cards. Nouveau is made of 3 components : DDX (2D driver), DRI (3D driver) and DRM (kernel component). The DDX and DRI use the MIT license, the DRM uses a dual MIT/GPL license. REnouveau is under GPL.

High Priority Free Software Projects These are projects the FSF draws attention to because they do not have an adequate free software replacement yet: free 3D video drivers such as the nouveau project create a free BIOS – see LinuxBIOS Gnash – open Adobe Flash replacement Xiph.org internet protocolls such as OGG Theora reversible debugging to GDB. Weblinks FSF Campaigns: Priority Projects

Debian is a free software operating system distribution. Debian releases a linux distribution called “Debian GNU/Linux”, which at over ten years in development is one of the oldest linux distributions still under active development. Although “Debian GNU/Linux” is the most popular Debian release, Debian has also unofficially released distributions based on other open source kernels: Hurd, NetBSD, and FreeBSD. The Debian Project Debian hews closely to the standards

The GNU Project was launched in 1984 to develop a complete UNIX 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”, some say they are more accurately called GNU/Linux systems because of the suite of GNU tools they use.

A software distribution is a bundle of a specific software, already compiled and configured. Sometimes free and open-source software distributions are sold together with commercial support. See Also linux-distribution – popular example

An Free and Open Source Software project that is unmaintained lacks of somebody who actively develops it. This is a real problem as it becomes incompatible to the latest changes in libraries it depends on and known bugs don’t get fixed nor new features can be added as contributions by other developers cannot be applied. Weblinks unmaintained-free-software.org – a GNU FDL-licensed wiki of unmaintained/orphaned Free Software projects which are in need of a new maintainer.

The GNU General Public License is a popular copyleft open-source license. It was originally written by Richard Stallman for the GNU project. The basic premise of the GPL is that while anyone may use, modify, or redistribute code that is licensed under the GPL, any modifications to the code must be published under the GPL as well. External Links Text of GPL