Serna is a great, free (gpl) program only available for Windows, that is part of the category Development software with subcategory Development editors (more specifically HTML & XML) and has been published by Syntext.
More about Serna
Since we added this program to our catalog in 2011, it has reached 31,137 downloads, and last week it gained 6 downloads.The program version is 4.2 and was updated on 6/15/2011. It's available for users with the operating system Windows 2000 and prior versions, and you can get it in several languages like English, German, and French.About the download, Serna is a program that takes up less free space than most programs in the section Development software. It's a program often downloaded in countries such as Russian Federation and United Kingdom.
Serna supports the following formats
XML, DITA, DITAMAP