Engadget points to ONLYOFFICE and LibreOffice as free options for creating and editing documents and spreadsheets. Their official pages describe two desktop suites with different emphases, rather than exact copies of every Microsoft Office feature.
ONLYOFFICE focuses on Microsoft formats and PDFs
ONLYOFFICE Desktop Editors combines document, spreadsheet, presentation and PDF tools in one app. It is available for Windows, Linux and macOS, works offline and can connect to services including Dropbox, Nextcloud, ownCloud and ONLYOFFICE for collaboration.
The company claims native compatibility with DOCX, XLSX and PPTX files. Its PDF tools can edit text, images and layouts, create and fill forms, convert PDFs and add password protection or digital signatures.
ONLYOFFICE also offers an optional AI layer for writing, translation, data extraction and other tasks. The product page says users can choose providers and enable the tools rather than having them forced into the core editing experience.
LibreOffice provides a broader open-source suite
LibreOffice describes itself as a free, open-source office suite with six main tools. Writer handles word processing, while Calc covers spreadsheets and Impress creates presentations.