Free xml schema management software for windows

XML Hammer simplifies elementary XML actions like checking for well-formedness, validation, transformation and xpath searches us XML Hammer is an open-source and free software that simplifies elementary XML actions like checking for well-formedness, validation, transformation and xpath searches using any JAXP implementation.
After all these years of XML, it is still relatively difficult to simply validate or transform XML files. You are currently either forced to use extensive, sometimes expensive, and most often difficult to use tools with a lot of extra functionality unnecessary for these simple tasks and very often not flexible enough to provide what you want, or you will have to be almost a programmer and create your own application or script to handle these elementary XML related tasks.
The XML Hammer tool addresses these issues by providing a free and open-source tool that has a (relatively) simple to use user-interface however still allowing the flexibility for the user to specify anything that he/she would have been able to specify when writing a script for this same task him/herself.
The functionality of the XML Hammer tool is based on the capabilities provided by the Java API for XML Processing (JAXP) and supports the JAXP API as fully as possible.
To achieve this, the functionality has been divided into five specific project types:
- XML Parser - Parse and validate XML files, using DTDs, XML Schema and other schema languages.
- XPath Search - Perform XPath searches on XML files.
- Schema Validator - Parse and validate Schema files, for XML Schema and other schema languages.
- XSL Transform - Transform XML documents using XSLT, allowing to specify associated and multiple transformations.
- Stylesheet Validator - Validate XSLT documents.
System requirements:
- JDK: 5.0 or above.
- Disk: The XML Hammer takes approximately 30MB to install.
- Operating System: In theory the XML Hammer can be run on any operating system where JDK 5.0 has been installed.

A simple command line tool designed to check an xml file for well-formedness .NET XML Checker and Validator is a simple command line tool designed to check an xml file for well-formedness and, optionally, will validate it against a supplied XML schema file (xsd).
I built it to check that my sites HTML files were well-formed (and therefore XHTML-compliance), but its got all kinds of other uses, including checking .NET .config files

XMLSpear is a free XML editor, created for viewing, editing and correcting XML. It is easy to use, built in Java and available for all platforms.
With XMLSpear you can open an XML document and matching schema. You will be presented with a graphical interface based on the particular document and schema. All your updates will be validated against the schema.
Main features:
- Source Editor
- Improve coloring
- Jump to error location
- Better undo support (fixed 2006-03-01)
- Schema support
- Plugins
- Manual for making import and export plugins
- Validation
- More flexibility for loading schema (xml catalog)
- OS Integration
- Package as double clickable application
- Register filetypes for the application
- React to open file events form system

XmEdiL is free document editor for XML and other languages. It is designed to be used by professional XML and other programmers and novices alike. For the professional XML programmer it offers features that enhance and improve productivity. For those learning XML, XmEdiL offers features that enable you to become comfortable and familiar with the language quickly and easily.
The primary intended use of XmEdiL is the ability to quickly and easily author XML documents and XML related projects. XmEdiL contains everything you need to write, process, and debug XML documents. You can validate and transform XML documents. The XPath builder helps you to construct and evaluate XPath queries. Import tabular data as XML.
Moreover being generally text editor, XmEdiL is also capable of editing other languages like HTML, XSL, CSS, JavaScript etc. With Language Editor, XmEdiL can be extended to use more languages.
Designed to meet Windows interface guidelines, XmEdiL users can expect a familiar and intuitive user interface.
Entirely documented.
Main features are:
- Conforms to the latest W3C specifications
- Checks well-formedness
- Validates XML documents against DTD/XML Schema
- Generation of sample XML file from XSD Schema
- Assigning XML schemas and XSL stylesheets
- Performs XSL transformation
- Build and evaluate XPath queries
- Import tabular data as XML documents
- Entry helpers for elements, attributes and entities. Language based
- Three Autocomplete features
- Language based Intellisense for quick authoring
- Project management
- Language Editor for custom languages
- Multi language support (HTML, CSS, JavaScript, VB etc.)
- Customizable syntax colorizing
- Language based comment/uncomment
- Integrated browser
- Pretty view for structured document display
- Docking/floating windows
- Templates for new documents
- Export to PDF
- Find and Replace features
- Dozens of custom settings