1)   Remove Duplicates from Excel 1.1.4
The add-on is designed for searching and processing duplicates in Excel tables. Program key functions: a search across rows or columns; search across an entire table or a specified range of cells; an opportunity to compare by values or formulas.
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 2)   ProSearchCMP 2.1.16
ProSearchCMP offers an easy and fast way to search inside multiple Word, Access and Excel files, providing ProSearchMDB/DOC/XLS functionality.
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 3)   Compare Spreadsheets for Excel 1.1.5
A powerful add-on for comparison of Microsoft Excel files. Program features: work with files, tables or the selected range of cells; work with files without opening them in Microsoft Excel.
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 4)   Similar Data Finder for Excel 1.1.4
This add-on helps you to find cells with similar values in Excel worksheets. The program enables you to quickly find mistakes made while entering cell values; easily correct the mistakes; find and mark cells which seem to be incorrect.
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