Viewer Tool Inc.
It is a specialized viewer and recovery tool for damaged XLS/XLSX files.
This program can batch convert xlsx to xls files format without MS Excel 2007.
UBmatrix™ Report Builder Microsoft Office Edition integrates with Excel.
Xls to Xlsx Batch Converter convert Excel 2003 to/from Excel 2007.
Recovery Toolbox, Inc.
It is a completely free solution for recovering Microsoft Excel files.
Repair and recover corrupted Microsoft Excel (.xlsx) file.
Easily read XLSX files with the help of XLSX to XLS Converter.
SysTools XLSX Recovery is a reliable solution to recover corrupted XLSX files.
Corrupt XLSX File Recovery
Perform quick corrupt XLSX file recovery by bringing into use XLSX Recovery tool.
Converts multiple xls and xlsx files into xlsx, xlsb and xls files.
The C# XLSX Library
Create xlsx files in C# as well as convert xlsx to xls using C#.
Upgrade your XLS file to XLSX and downgrade XLSX to XLS without Excel app installation.
Altova StyleVision is a visual stylesheet designer for XML, XBRL, and databases.
MashIQ XBRL Report is a powerful, multi-dimensional instance viewer.
Converting the XBRL Software sheet into XML file format by the Product Comp Law.