I just released version 0.3.0 of Tagneto. From tagneto.org:
Tagneto includes a "View Assembly" web developer tool written in Java (1.4+ supported). It does not require Java to run on a web server or to be installed on the end user's computer. The Java tool is an HTML/XML parser that allows the web developer to assemble the HTML/XML source into the final set of pages that will be used as the web application. The source does not have to be valid HTML or XML, but the tags that Tagneto handles do have to be well-formed, as defined by one of the supported syntaxes. Similar technologies to the View Assembly tool would be JSP/ASP/PHP. Read the Why document to understand the motivation for Tagneto and how it is different (it will also work with JSP/ASP/PHP).
Tagneto was designed to support internationalization (I18N) and localization (L10N), both in the output pages and in the syntax and wording of the actual Tagneto tags. However, the I18N and L10N support has the least amount of testing, so you may find issues.
For more information on Tagneto features (like non-invasive source configuration, overlays, custom tags), please read the What page.