# spreadsheet application

> AI-ranked search results for `excel open source` on awesome-repositories.com — ordered by an LLM for relevance, best match first. 117 total matches; showing the top 4.

Explore on the web: https://awesome-repositories.com/q/excel-open-source

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## Results

- [collaboraonline/online](https://awesome-repositories.com/repository/collaboraonline-online.md) (2,985 ⭐) — This project is a cloud-based office suite and self-hosted document server that enables the creation and editing of documents, spreadsheets, and presentations. It functions as a headless office application, utilizing a server-side processing engine to handle file rendering and formatting without requiring a local graphical user interface.

The system operates as a real-time collaborative editor, employing operational transformation to allow multiple users to edit files simultaneously. It also serves as a web-based document processor capable of automating office tasks through macro execution an
- [onlyoffice/documentserver](https://awesome-repositories.com/repository/onlyoffice-documentserver.md) (6,633 ⭐) — ONLYOFFICE DocumentServer is a self-hosted online office suite that provides browser-based document, spreadsheet, and presentation editing with real-time collaborative capabilities. It natively supports Office Open XML formats (.docx, .xlsx, .pptx) and can be deployed on Linux servers, either through Docker containerization or direct installation.

The server includes a cooperative editing engine that coordinates simultaneous changes across multiple users using operational transformation, with a WebSocket synchronization layer for instant state propagation. Security is handled through JWT auth
- [ironcalc/ironcalc](https://awesome-repositories.com/repository/ironcalc-ironcalc.md) (3,750 ⭐) — IronCalc is an XLSX spreadsheet engine and formula evaluator designed to compute numerical expressions and manage workbook structures. It utilizes a logic engine compatible with industry standards to evaluate formulas and manage cell dependencies.

The project provides a comprehensive suite of specialized toolkits, including a financial calculation library for bond pricing and net present value, and an engineering math toolkit for complex number arithmetic and Bessel functions. It also features a web-based spreadsheet interface for creating and formatting workbooks.

The engine covers a broad
- [gristlabs/grist-core](https://awesome-repositories.com/repository/gristlabs-grist-core.md) (11,176 ⭐) — Grist is a relational spreadsheet platform that combines the flexibility of a spreadsheet with the power of a relational database. At its core, it manages structured data across multiple linked tables, using a relational database engine to organize information while providing a familiar grid interface. The platform supports Python-based formulas for complex calculations and data transformations, with automatic recalculation when referenced cells change.

The system is designed for self-hosted deployment, storing data in either portable SQLite files or enterprise-grade PostgreSQL databases. It