Open source text and code editor for designing web applications.

Brackets is an open source text and code...can edit HTML and CSS code 

It allows you to develop and test your entire web application.

Studio is an open-source program...in authoring of HTML, CSS, JavaScript, PHP 

Design and create electronic books in the EPUB format in a professional way.

about – an open-source e-book creation...directly on the HTML code...and – of course – HTML headings, CSS...a TXT or HTML 

Create applications in any programming language, with syntax highlighting.

of the program codes, including Java, JavaScript...C#, C , VHDL, MXML, MySQL, HTML, and VisualBasic 

Text-based editor for markup and/or programming language

Bluefish is an open-source text editor, specialized...or programming language code (HTML, CSS, C, PHP...the inclusion of code that can...to use the code 

Provides the means to build mobile applications and Windows-based services.

Desktop is an open source solution for developing...and stylization with HTML, CSS and Javascript...use the same code on multiple...to write the code from scratch 

Edit, convert, and debug XML databases, files, and servers.

Oxygen XML Editor is a comprehensive tool for editing, converting, and debugging of XML data. It can perform XQuery and XPath queries against a native XML 

High performance text editing and parsing XML files.

character functions, and C code generation 

FlashDevelop is an open source code editor for ActionScript and Haxe development

FlashDevelop is an open source code editor for ActionScript...development IDE with source-control support...XML/HTML completion and zen-coding for HTML 

Free Script Editor 3.0 is an application designed for web developers.

allows you to open unlimited-size...programming languages, including HTML, CSS, SQL...be converted to HTML. Free Script...colors, to modify source options