PyBiz's XML indexing and search engine, XDisect, is now available as a free download for purposes of evaluation.

Chetan Patel from PyBiz writes:

XDisect now offers very high speed indexing capabilities. It also includes the ability to make incremental changes to the XML data ... XDisect supports index sizes of greater +than 2 Gigabyte on Windows NT/2000, Solaris and Linux.

XDisect has an XML/HTTP API, which should simplify integration with other systems. Queries against documents can also be performed using SQL. XDisect also includes a browser-based GUI.