Jase: your lightning fast open source HTML editor
Jase is an open source multi purpose editor running on all flavors of windows (Okay. There might be some issues left with vista, but the program should run smoothly even there).
Jase was designed in the tradition of puristic text-based HTML editors – no wysiwyg, no nonsense.
Nevertheless this webeditor will give you efficient assists in writing your HTML code, especially by taking over boring tasks like generating tables and lists, calculating relative links and much more. Jase also includes (more or less) support for other formats and languages like PHP, CSS, XML or SQL. There are different integrated preview options, HTML and CSS documentations, tidy and much more.
Download: Jase 0.93