• Compare files, folders/subfolders, data (grids) FTP sites or zip files side-by-side in a Explorer-like interface
• Hide files or folders that don’t contribute to comparison and show only relevant results using display filters:
  • Show all, Just mismatches, Just matches,
  • Two-sided, Two-sided mismatches,
  • Orphans, Older, Newer
  • Ignore files or folders based on patterns
• Powerful merge of changes between files with support for 3-way comparison
  • Manually alignment of the files to compare the correct records
  • In line Editing
  • Move to next difference or Move to next file comparisons
• Folders Synchronization
• Color highlighting of differences
• Sort by Name, Type, Date Modified, Size, CRC
• Multi-threaded operations:
  • Folders scanned in background
  • Files compared in background
  • Folders synchronized in background
• Comparison based on various criteria:
  • Date modified
  • File size
  • Attributes
  • Binary content comparison
  • Rules-based content comparison (possibly ignoring minor differences like Case, Whitespace, Comments)
• Support for Batch operations

Details: http://en.wikipedia.org/wiki/Beyond_Compare

Comparison: http://en.wikipedia.org/wiki/Comparison_of_file_comparison_tools

Download: http://www.scootersoftware.com/