XML Spy 4.4:
http://www.xmlspy.com/download/44/setup44.exe
XML Spy 4.3:
http://www.xmlspy.com/download/43/setup43.exe
XML Spy 4.2:
http://www.xmlspy.com/download/42/setup42.exe
XML Spy 4.1:
http://www.xmlspy.com/download/41/setup41.exe
XML Spy 4.0:
http://www.xmlspy.com/download/40/setup40.exe