eXchaNGeR - The XML Browser (and XML Editor)http://xngr.org/
XERLIN - XML Modeling Applicationhttp://www.xerlin.org/
DocPro by Command Prompt, INC. http://www.commandprompt.com/entry.lxp?lxpe=2
YAWC Pro by XML Workshop LTD. http://www.yawcpro.com/. Can be used for converting MS Word to Simple DocBook XML.
Logictran RTF Converter. http://www.logictran.com/. Word/RTF to HTML/XML.
MajiX - Word to XML converter. http://tetrasys.dhs.org/
XMETAL by SoftQuad http://www.softquad.com/
Tagless Editor by i4i (DocBook DTD not supported) http://www.i4i.com/
XML Editor by XMLmind http://www.xmlmind.com/xmleditor/
upCast and downCast by Inifinity Loop http://www.infinity-loop.de/en/products.html
W2XML by DocSofthttp://www.docsoft.com/w2xmlv2.htm
XMLWrite by Wattle Softwarehttp://xmlwriter.net/
oXygen XML Editor - Java Basedhttp://www.oxygenxml.com/
Xeena by IBMhttp://www.alphaworks.ibm.com/tech/xeena
Excosoft XML Clienthttp://www.excosoft.se/eweb/site/exc_pd.html
Timelux Xpresshttp://www.timelux.lu/html/Xpress2001.html
Morphonhttp://www.morphon.com/
Conglomeratehttp://conglomerate.org/