Django application and library for importing and exporting data
A pure PHP library for reading and writing spreadsheet files
Lightweight Java library developed by Alibaba for reading and writing
Convert files like docx, xlsx, pptx, html, and more to MarkDown
Create Web Based Forms Quickly, With In-built DB, For All Your Teams
Lightweight XLSX Excel Spreadsheet Writer in PHP
C++ library for creating XLSX files for MS Excel 2007 and above.
Libraries written in Go abstracting features needed for business apps
The FileHelpers are a free and easy to use .NET library to read/write
An interface for calling Python from Excel
Excel/VBA Integration of Picat programming language
Open source Extract Transform Load engine written in Java