David Megginson posted a request for information on C/C++ implementations of SAX that uncovered several implementations.

A followup post mentioned the Oracle C parser and the Gnome C parsers. Another post discussed issues with two publicly available C++ wrappers of James Clarks' Expat C parser.

The discussion of SAX C/C++ implementations then went off-topic into discussion of the licensing model of Expat. Here is the final message in the licensing part of the thread.