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SMILGen is a SMIL (and XML) authoring tool designed to ease the process of XML content creation. SMILGen understands XML syntax and handles the nesting, formatting and syntax of XML so that an author doesn't need to remember each quote and closing brace.
You can download file releases of SMILGen SMIL Generation Tool project from List of release files
System RequirementsOperating System: OS Independent
List of release files