Weblog software is software designed to simplify the creation and maintenance of weblogs

Blog

A blog is a type of website or part of a website supposed to be updated with new content from time to time. Blogs are usually maintained by an individual with regular entries of commentary, descriptions of events, or other material such as graphics or video. Entries are commonly displayed in...

. As specialized content management system

Content management system

A content management system is a system providing a collection of procedures used to manage work flow in a collaborative environment. These procedures can be manual or computer-based...

s, weblog applications support the authoring, editing, and publishing of blog posts and comments, with special functions for image management, web syndication

Web syndication

Web syndication is a form of syndication in which website material is made available to multiple other sites. Most commonly, web syndication refers to making web feeds available from a site in order to provide other people with a summary or update of the website's recently added content...

, and moderation of posts and comments.

Software used for top 20 blogs

The top blogs as ranked by Technorati

Technorati

Technorati is an Internet search engine for searching blogs. By June 2008, Technorati was indexing 112.8 million blogs and over 250 million pieces of tagged social media...

 use a mixture between third party software such as WordPress

WordPress

WordPress is a free and open source blogging tool and publishing platform powered by PHP and MySQL. It is often customized into a content management system . It has many features including a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internet's "top 1...

 and that developed and maintained primarily by internal engineers, such as the system used by Gizmodo

Gizmodo

Gizmodo is a technology weblog about consumer electronics. It is part of the Gawker Media network run by Nick Denton and is known for its up-to-date coverage of the technology industry, along with topics as broad as design; architecture; space and science....

.

	Blog	Software
1	The Huffington Post The Huffington Post The Huffington Post is an American news website and content-aggregating blog founded by Arianna Huffington, Kenneth Lerer, and Jonah Peretti, featuring liberal minded columnists and various news sources. The site offers coverage of politics, theology, media, business, entertainment, living, style,...	Movable Type Movable Type Movable Type is a weblog publishing system developed by the company Six Apart. It was publicly announced on September 3, 2001; version 1.0 was publicly released on October 8, 2001. On 12 December 2007, Movable Type was relicensed as free software under the GNU General Public License...
2	Gizmodo Gizmodo Gizmodo is a technology weblog about consumer electronics. It is part of the Gawker Media network run by Nick Denton and is known for its up-to-date coverage of the technology industry, along with topics as broad as design; architecture; space and science....	Gawker bespoke softwarehttp://getsatisfaction.com/gawker
3	TechCrunch TechCrunch TechCrunch is a web publication that offers technology news and analysis, as well as profiling of startup companies, products, and websites. It was founded by Michael Arrington in 2005, and was first published on June 11, 2005....	WordPress WordPress WordPress is a free and open source blogging tool and publishing platform powered by PHP and MySQL. It is often customized into a content management system . It has many features including a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internet's "top 1...
4	TMZ.com TMZ.com TMZ.com is a celebrity news website that debuted on November 8, 2005. It was a collaboration between America Online and Telepictures Productions, a division of Warner Bros., until Time Warner divested AOL in 2009. However, it is still affiliated with AOL News and has the AOL News logo affixed in...	WordPress WordPress WordPress is a free and open source blogging tool and publishing platform powered by PHP and MySQL. It is often customized into a content management system . It has many features including a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internet's "top 1...
5	Engadget Engadget Engadget is a multilingual technology blog network with daily coverage of gadgets and consumer electronics. Though on appearance Engadget functions much like a blog and may be defined as such, much of its editorial content takes the form of an online magazine...	Blogsmith
6	Mashable Mashable Mashable is an American news website and Internet news blog founded by Pete Cashmore. The website's primary focus is social media news, but also covers news and developments in mobile, entertainment, online video, business, web development, technology, memes and gadgets...	WordPress WordPress WordPress is a free and open source blogging tool and publishing platform powered by PHP and MySQL. It is often customized into a content management system . It has many features including a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internet's "top 1...
7	The Corner	Drupal Drupal Drupal is a free and open-source content management system and content management framework written in PHP and distributed under the GNU General Public License. It is used as a back-end system for at least 1.5% of all websites worldwide ranging from personal blogs to corporate, political, and...  (Same CMS as National Review National Review National Review is a biweekly magazine founded by the late author William F. Buckley, Jr., in 1955 and based in New York City. It describes itself as "America's most widely read and influential magazine and web site for conservative news, commentary, and opinion."Although the print version of the... )
8	Boing Boing Boing Boing Boing Boing is a publishing entity, first established as a magazine, later becoming a group blog.-History:...	Movable Type Movable Type Movable Type is a weblog publishing system developed by the company Six Apart. It was publicly announced on September 3, 2001; version 1.0 was publicly released on October 8, 2001. On 12 December 2007, Movable Type was relicensed as free software under the GNU General Public License...
9	Hot Air Hot air Hot air in economics refers to the Assigned Amount Units credits given for the reduction of Green House Gas emissions among the former Soviet Bloc countries since 1990....	WordPress WordPress WordPress is a free and open source blogging tool and publishing platform powered by PHP and MySQL. It is often customized into a content management system . It has many features including a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internet's "top 1...
10	Gawker	Gawker bespoke softwarehttp://getsatisfaction.com/gawker
11	Think Progress	WordPress WordPress WordPress is a free and open source blogging tool and publishing platform powered by PHP and MySQL. It is often customized into a content management system . It has many features including a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internet's "top 1...
12	The Daily Dish	Typepad TypePad TypePad is a blogging service from company Say Media . Originally launched in October 2003, TypePad is based on Six Apart's Movable Type platform, and shares technology with Movable Type such as templates and APIs, but is marketed to non-technical users and includes additional features like...
13	The Daily Beast The Daily Beast The Daily Beast is an American news reporting and opinion website founded and published by Tina Brown, former editor of Vanity Fair and The New Yorker as well as the short-lived Talk Magazine. The Daily Beast was launched on October 6, 2008, and is owned by IAC...	Unknown
14	Newsbusters	Drupal Drupal Drupal is a free and open-source content management system and content management framework written in PHP and distributed under the GNU General Public License. It is used as a back-end system for at least 1.5% of all websites worldwide ranging from personal blogs to corporate, political, and...
15	CNN Political Ticker	WordPress WordPress WordPress is a free and open source blogging tool and publishing platform powered by PHP and MySQL. It is often customized into a content management system . It has many features including a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internet's "top 1...
16	Ezra Klein Ezra Klein Ezra Klein is a liberal American blogger and columnist for The Washington Post, columnist for Bloomberg, a columnist for Newsweek, and a contributor to MSNBC...  at Washington Post	Unknown
17	Breitbart.tv	WordPress WordPress WordPress is a free and open source blogging tool and publishing platform powered by PHP and MySQL. It is often customized into a content management system . It has many features including a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internet's "top 1...
18	Big Government	WordPress WordPress WordPress is a free and open source blogging tool and publishing platform powered by PHP and MySQL. It is often customized into a content management system . It has many features including a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internet's "top 1...
19	ReadWriteWeb ReadWriteWeb ReadWriteWeb is a Web technology blog launched in 2003. RWW covers Web 2.0 and Web technology in general, and provides industry news, reviews, and analysis. Founded by Richard MacManus, Technorati ranked ReadWriteWeb at number 12 in its list of top 100 blogs worldwide, as of October 9, 2010. RWW...	Movable Type Movable Type Movable Type is a weblog publishing system developed by the company Six Apart. It was publicly announced on September 3, 2001; version 1.0 was publicly released on October 8, 2001. On 12 December 2007, Movable Type was relicensed as free software under the GNU General Public License...
20	Matthew Yglesias	WordPress WordPress WordPress is a free and open source blogging tool and publishing platform powered by PHP and MySQL. It is often customized into a content management system . It has many features including a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internet's "top 1...