Marcatura

Editor xml liberi o opensource

Amaya, il browser/editor del W3C.
WYMeditor, xhtml strict + css, wysiwym, opensource, javascript, multipiattaforma.
Kupu, html/xhtml+css, opensource, javascript, multipiattaforma. Kupu uses CSS in favor of HTML for layout and presentation. It supports asynchronous saving to the server. It sets event handlers from code instead of from the HTML (excepting the toolbar), which makes the code a lot cleaner. It uses DOM functionality to build up HTML. On those and other fronts it tries to use the most modern standardized techniques available on all supported browsers to ensure a good user-experience and clean code.
JXHTMLedit, xhtml/html, visuale (wysiwyg), Applet Java (richiede il Sun JavaTM Plug-in 1.4 o superiore installato sul client), multipiattaforma.

Limsee2, un editor di documenti in formato SMIL (2.x), scritto in Java, opensource.