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OpenLink Virtuoso - http://www.openlinksw.com/virtuoso/
A cross-platform, Internet data integration server, implementing native XML storage, web, file, and database server functionality and universal data access middleware as a single server solution. |
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http://www.xyleme.com/ - http://www.xyleme.com/
Dynamic data warehouse that is an indexed XML repository capable of answering queries from applications and users. |
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http://www.ixiasoft.com/ - http://www.ixiasoft.com/
native XML database server for content search and retrieval, supports WAP |
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Xenos Group, Inc. - http://www.xenos.com/
Provides data and electronic document transformation solutions. |
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X-Hive/DB - http://www.xhive.com/
XML Database in form of a Java-based persistent DOM implementation. |