Spreadsheets By Excel Free Download
Open Source Airtable Alternative
PowerShell module to import/export Excel spreadsheets, without Excel
The free and Open Source productivity suite
A standalone, portable Ada package for producing Excel spreadsheets
C++ library for creating XLSX files for MS Excel 2007 and above.
Library modules for creating ODF documents.
Repairs/Recovers Corrupt MS Office 2007 - 2013 Format Files
Makes easy MS recommended Excel recovery methods - adds 5 of its own.
Extracts text/data from corrupt MS Office 2007-13 format files.
palo olap open office calc plugin for data analysis
Add-In gathers MS recommended ways for uncorrupting Excel files.