My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.
XML Copy Editor - XML Copy Editor is a fast, free, validating XML editor.
LibreOffice - Base - Base, database, database frontend, LibreOffice, ODF, Open Standards, SQL, ODBC
Oxygen XML Editor - Oxygen XML Editor provides a comprehensive suite of XML authoring and development tools.
Kexi - Kexi | Calligra Suite
Liquid Studio - XML Tools Provider: XML Studio - Graphical XML Schema Editor.