1)   WinMerge 2.4.6
WinMerge is a tool for visual difference display and merging, for both files and directories. Unicode support. Flexible syntax coloring editor. Windows Shell integration. Regexp filtering. Side-by-side line diff. Highlights differences inside lines.

 2)   DiffDog Standard Edition 2005
Altova DiffDog 2005 Standard Edition is the dedicated differencing utility for developers and power users. This easy, powerful synchronization tool quickly compares files and folders then highlights differences and merges content via an elegant GUI.

 3)   DiffDog Professional Edition 2010
Altova DiffDog 2010 Enterprise Edition is a powerful diff/merge tool. This unique XML-aware sync utility compares files, folders, databases and XML Schemas. It indicates differences, intelligently merges content, and creates XSLT to convert XML data.

 4)   Visual Patch 1.0.0.3
Provides software developers with a comprehensive solution for creating secure full-history software update patches. Visually indicates the differences among product releases and automatically builds only those changes into a single-file patch.

 5)   Altova DiffDog 2009
Altova DiffDog 2009 Professional Edition is the powerful diff / merge tool for files and folders. This XML-aware synchronization tool quickly compares files and directories, highlights differences, and merges content via its intuitive interface.

 6)   Compare Two XML Files Software 7.0
Find content differences between two specified XML files. Differences are highlighted in red.