Go (golang) library for reading and writing XLSX files
An R package to create styled tables in multiple output formats
C++ library for creating XLSX files for MS Excel 2007 and above.
csv2odf can convert csv data to formatted spreadsheets and documents.
C library for reading/writing values from/to Excel .xlsx files.
Multi platform library to read and write schedule data
VBA add-ins which convert Microsoft Office contents to various formats
Ability to work with large csv files and cut them down to run in Excel
Extract data in CSV format from PDFs
The Excel add-in for creating LaTeX tables
Serializes and Deserializes objects into spreadsheets
Small, powerful, full featured WYSIWYG editor
Query Abstraction Layer
Open source Extract Transform Load engine written in Java