Todd Ditchendorf has released TeXMLMate 1.1, a free-beer plug-in for the Macintosh TextMate text editor that "adds an XML parsing palette to the popular TextMate text editor for Mac OS X. While editing an XML (or XHTML) document in TextMate, you can open the TeXMLMate palette to conveniently check your document for well-formedness or validity against a DTD, W3C XML Schema, RELAX NG schema, or Schematron schema."
Peter Borg has released Smultron 2.2.6, an open-source Mac OS X text editor. Features include "line numbers, support for syntax colouring for many different languages, functions list, support for text encodings, snippets, a toolbar, a status bar, HTML preview, split window, multi-document find and replace with regular expressions, possibility to show invisible characters, tabs, authenticated open and saves, command-line utility, .Mac synchronisation, full screen editing and running commands from within Smultron."
