Nvu/Kompozer: Under two different names, these two projects are based on Mozilla Composer.
Amaya: a standard-compliant web editor, created by the W3C, free and open-source.
WebAcappella: A WYSIWYG tool that requires no programming knowledge.
Source code editors
Notepad ++ is a free source code editor which supports several languages. *It uses the same component as SciTE (Scintilla). It provides the ability to auto-complete your code for some languages ??by providing a list of basic functions. Everything is customizable. The default syntax highlighting is very relevant.
Distributed freely under the GPL.
An excellent editor for Windows. It possesses severalfeatures and practical details. In addition, it is very light. It is very similar to Notepad ++, you can add extensions, available on the official website. It includes *Tidy (for verification/correction of HTML codes) as well as various specific tools for HTML: compression of HTML, reformatting, color picker...etc