Top 10 ooxml open source projects

Epplus
Create advanced Excel spreadsheets using .NET
Unioffice
Pure go library for creating and processing Office Word (.docx), Excel (.xlsx) and Powerpoint (.pptx) documents
EPPlus4PHP
an easy-to-use excel library for php project which is compiled with peachpie. NOT FOR THE COMMON PHP PROJECT!
apooxml
Generate YARA rules for OOXML documents.
xgen
XSD (XML Schema Definition) parser and Go/C/Java/Rust/TypeScript code generator
file2html
JS convertor of files to HTML and CSS code
wordroller
Free Microsoft Word document (aka .docx) processing library for .Net
1-10 of 10 ooxml projects