NIFTY Index live option chain data in Excel sheet (in simplified view)
A pure PHP library for reading and writing spreadsheet files
A standalone, portable Ada package for producing Excel spreadsheets
Javascript plugin to create web-based tables & spreadsheets
A terminal spreadsheet multitool for discovering and arranging data
Data science spreadsheet with Python & SQL
C++ library for creating XLSX files for MS Excel 2007 and above.
Lays out dependencies (links) between Excel files in a visual graph
Compares two Excel files on a cell-by-cell basis and dumps differences
OTC Trading Network
an embeddable spreadsheet for your web application
Small, fast Java library for reading and writing CSV files