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Serna looks like the best one on this list if you are not new to the topic ...<br />
<a href="http://webdesign.about.com/od/xmleditors/tp/free-xml-editors.htm" rel="ugc">http://webdesign.about.com/od/xmleditors/tp/free-xml-editors.htm</a>
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Serna looks like the best one on this list if you are not new to the topic ...
http://webdesign.about.com/od/xmleditors/tp/free-xml-editors.htm [http://webdesign.about.com/od/xmleditors/tp/free-xml-editors.htm]

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Hi,<br />
We are currently using a Drupal CMS. Users have tones of content pages to upload ,format with images and HTML tags. <br />
<br />
The default Ckeditor works well but I need some additional functionality to be provided to users. One of most important thing they need is HTML column format so that they can create content pages formatted as 2 column,3 column or multi column. Please see attached image from confluence editor page.<br />
<br />
Can someone suggest me an open source editor who can format similar pages.<br />
<br />
Thanks<br />
<a href="https://filedb.experts-exchange.com/incoming/2013/06_w23/658009/2013-06-03-18-04-41-Add-Page---T.png" target="_blank" class="file-inline" title="add conent pages (11 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>2013-06-03-18-04-41-Add-Page---T.png</a>
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2013-06-03-18-04-41-Add-Page---T.png

Hi,
We are currently using a Drupal CMS. Users have tones of content pages to upload ,format with images and HTML tags. 

The default Ckeditor works well but I need some additional functionality to be provided to users. One of most important thing they need is HTML column format so that they can create content pages formatted as 2 column,3 column or multi column. Please see attached image from confluence editor page.

Can someone suggest me an open source editor who can format similar pages.

Thanks

Open Source HTML/XML editor

Web development includes all aspects of presenting content on intranets and the Internet, including delivery development, protocols, languages and standards, server software, browser clients, databases and multimedia generation.

Web Development

Drupal is an open-source content-management framework written in PHP used as a back-end framework for websites and is also used for knowledge management and business collaboration. The standard release of Drupal contains basic features common to content management systems, including user account registration and maintenance, menu management, RSS feeds, taxonomy, page layout customization, and system administration. Drupal runs on any computing platform that supports both a Web server capable of running PHP and a database to store content and configuration.

Drupal

Content management (CM) is a set of processes and technologies that supports the collection, managing, and publishing of information in any form or medium. When stored and accessed via computers, this information may be more specifically referred to as digital content, or simply as content. Digital content may take the form of text (such as electronic documents), multimedia files (such as audio or video files), or any other file type that follows a content lifecycle requiring management.