XML Parsers

Read XML Document
Verify that XML is well formed
Verify that XML is valid

expat, parser written in C by James Clark (www.jclark.com)
XML for Java (XML4J), from IBM Alphaworks
(www.alphawors.ibm.com/tech/xml4j)
Lark, written in Java (www.textuality.com/Lark/)
Apache Xerces (www.apache.org)
XP by James Clark (www.jclark.com)
Oracle XML Parser (technet.oracle.com/tech/xml)
Sun Microsystems Project X (java.sun.com/products/xml)