VibeOffice.work: Quire (documents), Ledger (spreadsheets) and Lectern (presentations).
Everything runs in your browser; documents are opened and saved on your own computer.
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Open source under the Apache License 2.0, provided as is, without warranty. VibeOffice.work is an independent project. Product names in its documentation are trademarks of their owners; VibeOffice.work is not affiliated with them.