Compare It!

Compare It! screenshots

Compare It! shows you the differences between two files
DOC comparison
Compare It! 4.1 : DOC comparison

Alternative downloads

Devart Code Compare
Program for comparing and merging files and folders.
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Compare Spreadsheets for Excel
A useful tool to compare Excel spreadsheets' values and formulas automatically.
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Workbook Compare
Compare worksheets even if they have different names.