RIA-Media Viewer - the most powerful photo, video, fonts and other viewer. Supported bmp, gif, jpg, jpeg, png, ico, emf, wmf, mp3, wav, wma, htm, html, xml, xsl, xslt, mdb, dbf and ttf formats and more with plugins.
TemplateMaker is an advanced XML and XSL Editor. Clear and easy to use IDE. Source, tree, data edit modes. All the usual editor capabilities (cut, copy, paste, undo, redo) plus allowing syntax highlighting.