Template file for creating new QuarkXPress projects; used for designing multiple documents with similar layouts, such as brochures, newsletters, books, etc; may be included with the QuarkXPress software or created by the user.
Program(s) that open qxt files
Mac / Windows: QuarkXPress; Adobe InDesign with Q2ID Plugin
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/qxt
