Compare PDF can compare both - related and non-related files.
"By keywords" comparison feature highlights common and unique keywords, allowing to compare non-related files.

Word-by-word comparison compares files with a common ancestor.
Folder comparison function allows to compare two folders and files within it.
If you work with plain text, then you can edit compared documents, apply or decline changes.

Finally, you can bring comparison details to simple or advanced structured report.

• Compare Suite 2.
  Compare Suite can compare both - related and non-related files. "By keywords" comparison feature highlights common and unique keywords, allowing to compare non-related...

• Compare PDF 3.0
  Compare PDF can compare both - related and non-related files

• Compare Suite 3.0
  Compare Suite can compare both - related and non-related files. By keywords comparison feature highlights common and unique keywords, allowing to compare non-related files. Word-by-word comparison compares files with a common ancestor. Folder...

• Advanced CATaloguer 2.3.5
  Advanced CATaloguer - easy-to-use cataloguing software for finding files stored on all kinds of digital media (from hard drives through all kinds of modern removable media to floppy disks)