You need to convert DITA documents to PDF, DOCX, ODT, Web Help, EPUB, etc, and don't like command-line tools. Look no further, give XMLmind XSL Utility a try: http://www.xmlmind.com/foconverter/downloadeval.shtml

Moreover, XMLmind XSL Utility allows to extensively configure and customize the conversion process without having to tweak obscure files by hand.

Latest version supports computers having very high resolution (HiDPI) screens and comes with a Mac OS X native ".dmg" distribution.