A pure PHP library for reading and writing spreadsheet files
A terminal spreadsheet multitool for discovering and arranging data
Javascript plugin to create web-based tables & spreadsheets
Data science spreadsheet with Python & SQL
Google Sheets Python API
The free and Open Source productivity suite
Library modules for creating ODF documents.
stylefmt is a tool that automatically formats stylesheets
Lays out dependencies (links) between Excel files in a visual graph
Compares two Excel files on a cell-by-cell basis and dumps differences