Python

Type	platform

Tools

ElementTree	XML middleware	Fredrik Lundh
GNOWSYS	Topic map engines	GNOWSYS
GPS	XML middleware	Geir Ove Grønmo
LT PyXML	XML middleware	Edinburgh Language Technology Group
PyTREX	XML validators	James Tauber
Pyana	XSLT engines	Brian Quinlan
Python XML package	XML middleware	The Python XML-SIG
Pyxie	XML middleware	Sean McGrath
Redfoot	XML document database systems, RDF parsers	The Redfoot Team
Sablotron	XSLT engines	Ginger Alliance
Schematron	XML validators	Rick Jelliffe
SemanText	Topic map engines	Eric Freese
Skyron	Data binding engines	John Wilson
TmTk	Topic map engines	Jan Algermissen
XML Schema Validator	XML validators	Henry Thompson, Richard Tobin
dtddoc	DTD documenters	Lars Marius Garshol
lxml	XML parsers	Martijn Fassen
maki	Web publishing	Sam Brauer
pysp	SGML/XML parsers	Lars Marius Garshol
tmproc	Topic map engines	Geir Ove Grønmo
xmlarch	Architectural forms engines	Geir Ove Grønmo
xmldiff	XML document management utilities	Alexandre Fayolle
xmlproc	XML parsers, DTD parsers	Lars Marius Garshol
xmltools	XML editors	Alexandre Fayolle

Free XML Tools, created using the OKS.