Datahike - A durable datalog database adaptable for distribution.
Altova XMLSpy - The XMLSpy XML Editor is a powerful tool for editing XML and related technologies. It is the only XML Editor with patented SmartFix validation, enterprise-grade editors, converters, debuggers, and code generators.
Datomic - The fully transactional, cloud-ready, distributed database
XML Copy Editor - XML Copy Editor is a fast, free, validating XML editor.
MarkLogic Server - MarkLogic Server is a multi-model database that has both NoSQL and trusted enterprise data management capabilities.
Liquid Studio - XML Tools Provider: XML Studio - Graphical XML Schema Editor.