Awesome GitHub RepositoriesFile Format Specifications

PHPExcel is a PHP spreadsheet library used for programmatically reading and writing spreadsheet files in various formats. It utilizes an in-memory spreadsheet model that maps spreadsheet structures to a hierarchy of objects for programmatic manipulation. The library functions as an Office Open XML processor for generating and manipulating XLSX documents and serves as a reader for extracting data and structure from legacy binary XLS files. It also includes tools for CSV data integration and importing. The project provides capabilities for automated report generation and spreadsheet data extra

Livebook is an interactive notebook platform for Elixir that provides a web-based environment for writing and running code cells alongside Markdown content, visualizations, and reproducible workflows. It serves as a multi-cloud auto-clustering tool that automatically discovers and joins Elixir nodes into clusters across Kubernetes, AWS ECS, and Fly.io for distributed execution, and also functions as a notebook deployment tool that packages notebooks into standalone web applications with authentication, secrets, and Docker support. The platform enables real-time collaborative editing, synchron

Quarto is an open-source scientific and technical publishing system built on Pandoc that converts Markdown and Jupyter notebooks into a wide range of output formats. It functions as a multi-format document converter, a reproducible research platform, a static site generator for technical content, and an interactive dashboard builder, all within a single framework. The system is distinguished by its ability to produce HTML, PDF, Word, ePub, and slide decks from a single Markdown source, while embedding executable code blocks in Python, R, Julia, or Observable for dynamic, reproducible document