Examples
Much of the Internet runs on open-source software tools and utilities such as Linux, Apache, MySQL, and PHP, known as the LAMP stack for web servers. Using open source appeals to software developers for three main reasons: low or no cost, access to source code they can tailor themselves, and a shared community that ensures a generally robust code base, with quick fixes for any new issues that surface.
Despite doing much business in proprietary software, some companies like Oracle Corporation and IBM participated in developing free and open-source software to deter from monopolies and take a portion of market share for themselves. See Commercial open-source applications for the list of current commercial open-source offerings. Netscape's actions were an example of this, and thus Mozilla Firefox has become more popular, stealing market share from Internet Explorer.
- Active Agenda is offered for free, but requires all extensions to be shared back with the world community. The project sells a "Non-Reciprocal Private License" to anyone interested in keeping module extensions private.
- Adobe Systems offers Flex for free, while selling the Flash Builder IDE.
- Apple Inc. offers Darwin for free, while selling Mac OS X.
- Codeweavers sells CrossOver commercially, deriving it from the free Wine project they also back.
- Canonical Ltd. offers Ubuntu for free, while they sell commercial technical support contracts.
- Francisco Burzi offers PHP-Nuke for free, but the latest version is offered commercially.
- DaDaBIK, although following a donationware approach, requires a small, minimum donation fee, to be downloaded.
- Ingres is offered for free, but services & support are offered as part of a subscription. The Ingres Icebreaker Appliance is also offered as a commercial database appliance.
- id Software releases their legacy game engines under the GPL, while retaining proprietary ownership on their latest incarnation.
- Mandriva offers Mandriva Linux Free and Mandriva Linux One for free, while selling Mandriva Linux 2008.
- Mozilla Foundation have a partnership with Google and other companies which provides revenue for inclusion of search engines in Mozilla Firefox.
- MySQL is offered for free, but with the enterprise version includes support and additional features.
- Novell offers openSUSE for free through the openSUSE Project, while selling SUSE Linux Enterprise (SLE).
- OpenSearchServer offers its community Edition on Sourceforge and an Enterprise Edition with Professional services to Enterprises with a paid license
- Oracle - VirtualBox is free and open-source to anyone, but the VirtualBox extension pack can only be used for free at home, therefore requiring payment for business
- Red Hat sells support subscriptions for Red Hat Enterprise Linux (RHEL) which is an enterprise distribution periodically forked from the community-developed Fedora.
- Sourcefire offers Snort for free, while selling Sourcefire 3D.
- Sun Microsystems offered OpenOffice.org for free, while selling StarOffice.
- Untangle provides its Lite Package for free, while selling its Standard and Premium Packages by subscription.
- Zend Technologies offers Zend Server CE and Zend Framework for free, but sells Zend Server with support and additional features.
Read more about this topic: Business Models For Open Source Software
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