Calligra Suite
calligra.org
Calligra Suite is an office and graphic art suite by KDE. It contains applications for word processing, spreadsheets, presentation, vector graphics, and editing databases.
Etherpad is an open-source, highly customizable online real-time collaborative text editor. It enables multiple users to co-author document drafts, meeting notes, and brainstorming outlines simultaneously, featuring col…
Create and edit web-based documents, spreadsheets, and presentations. Store documents online and access them from any computer.
LibreOffice is the most popular, full-featured open-source office productivity suite. It includes Writer (word processing), Calc (spreadsheets), Impress (presentations), Draw (vector graphics and flowcharts), Base (data…
OnlyOffice
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ONLYOFFICE Desktop Editors is a free, open-source office suite that uses OOXML (DOCX, XLSX, PPTX) as its native file format, offering exceptionally high compatibility with Microsoft Office documents. It features a moder…
Collaborative Office Suite
CryptPad is an open-source, end-to-end encrypted real-time collaborative office suite. It allows users to create rich text documents, spreadsheets, presentations, kanban boards, and whiteboards directly in the browser. …
Euro-Office
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A European open-source office suite built on ONLYOFFICE technology, offering browser-based document, spreadsheet, presentation, and PDF editors with OOXML and ODF support .
WordCraft
A clean-room reimplementation of Word written in Rust, targeting DOCX compatibility with a Word-style ribbon, styles, track changes, and mail merge; roughly 62% feature parity at v0.3 .
Collabora Online
Collabora Online is an enterprise-grade, open-source server component based on LibreOffice engine technology. When integrated with self-hosted cloud platforms like Nextcloud or ownCloud, it brings full-featured collabor…