MySQL MySQL is a relational database management system (RDBMS)[1] that runs as a server providing multi-user access to a number of databases. Free-software projects that require a full-featured database management system often use MySQL. Such projects include (for example) WordPress, phpBB, Drupal and other software built on the LAMP software stack. MySQL is also used in many high-profile, large-scale World Wide Web products, including Wikipedia, Google[5] and Facebook.[6] MySQL is a multithreaded, multi-user, SQL database management system (DBMS) now owned by Oracle Corporation with more than eleven million installations.[8] MySQL has been owned by Oracle Corporation since April 20, 2009 through the purchase of Sun Microsystems.[9][10] Sun had acquired MySQL originally on January 16, 2008. ***************************** WordPress WordPress is an open source Content Management System (CMS), often used as a blog publishing application, powered by PHP and MySQL. It has many features including a plug-in architecture and a template system. The core contributing developers include Ryan Boren, Mark Jaquith, Matt Mullenweg, Andrew Ozz, and Peter Westwood. [51] WordPress is also developed by its community, including WP testers, a group of volunteers who test each release. They have early access to nightly builds, beta versions and release candidates. Errors are documented in a special mailing list, or the project's Trac tool. Though largely developed by the community surrounding it, WordPress is closely associated with Automattic, the company founded by Matt Mullenweg. ************************************ phpBB is a popular Internet forum package written in the PHP scripting language. The name "phpBB" is an abbreviation of PHP Bulletin Board. Available under the GNU General Public License, phpBB is free software.[2] ************************* PHP PHP is free software released under the PHP License, which insists that: PHP is a reflective programming language originally designed for producing dynamic web pages. PHP is used mainly in server-side application software. PHP is a general-purpose scripting language that is especially suited to server-side web development where PHP generally runs on a web server. Any PHP code in a requested file is executed by the PHP runtime, usually to create dynamic web page content. It can also be used for command-line scripting and client-side GUI applications. PHP can be deployed on most web servers, many operating systems and platforms, and can be used with many relational database management systems (RDBMS). It is available free of charge, and the PHP Group provides the complete source code for users to build, customize and extend for their own use.[33] As of April 2007, over 20 million Internet domains had web services hosted on servers with PHP installed and mod_php was recorded as the most popular Apache HTTP Server module.[38] PHP is used as server-side programming language on 75% of all web servers.[39] Significant websites are written in PHP including the user-facing portion of Facebook,[40] Wikipedia (MediaWiki),[41] Digg,[42] Joomla, eZ Publish, WordPress,[43] Drupal [44] and Moodle.[45] ************************** LAMP: architecture for deploying web applications LAMP is an acronym for a solution stack of free, open source software, originally coined from the first letters of Linux (operating system), Apache HTTP Server, MySQL (database software) and Perl/PHP/Python, principal components to build a viable general purpose web server[1]. **************************** Drupal Drupal (pronunciation: /ˈdruːpəl/) is a free and open source content management system (CMS) written in PHP and distributed under the GNU General Public License.[2][3][4] It is used as a back-end system for over 1% of all websites worldwide[5] ranging from personal blogs to corporate, political, and government sites including whitehouse.gov and data.gov.uk.[6][7] It is also used for knowledge management and business collaboration. ********************************** Apache HTTP Server The Apache HTTP Server, commonly referred to as Apache (pronounced /əˈpætʃiː/), is web server software notable for playing a key role in the initial growth of the World Wide Web.[2] In 2009 it became the first web server software to surpass the 100 million web site milestone.[3] Apache was the first viable alternative to the Netscape Communications Corporation web server (currently known as Oracle iPlanet Web Server), and has since evolved to rival other Unix-based web servers in terms of functionality and performance. The majority of web servers using Apache run a Unix-like operating system.[citation needed] Apache is developed and maintained by an open community of developers under the auspices of the Apache Software Foundation. The application is available for a wide variety of operating systems, including Unix, GNU, FreeBSD, Linux, Solaris, Novell NetWare, Mac OS X, Microsoft Windows, OS/2, TPF, and eComStation. Released under the Apache License, Apache is characterized as open-source software. Since April 1996 Apache has been the most popular HTTP server software in use. As of November 2010[update] Apache served over 59.36% of all websites and over 66.56% of the million busiest.[4] The system operates through the work of volunteers who specialize in certain areas of coding. The Apache Group (AG) emphasizes decentralization and has a low interdependency in the tasks they do.[12] The AG is a multinational server, having developers located in U.S., Britain, Canada, Germany, and Italy. Although Apache collaborates as a group, the work is done by individuals.[13] Their decisions are a result of e-mail and quorum voting system.[12] The Apache License allows for the distribution of both open and closed source derivations of the source code. ********************************* OpenOffice OpenOffice.org is a multiplatform and multilingual office suite and an open-source project. Compatible with all other major office suites, the product is free to download, use, and distribute. *********************** Linux is a free software kernel, which combined with the GNU libraries, core utils and shell form the GNU/Linux operating system. ******************* 440,040 OS projects listed at http://www.ohloh.net/ 756,564 developers http://www.ohloh.net/p last retrieval : december 17, 2010 Ohloh is a free public directory of open source software and people >> community, social network site, wiki style.