LibreOffice
Free office suite for documents, sheets and slides
LibreOffice includes Writer, Calc, Impress, Draw, Base and Math. It reads and writes Microsoft Office formats and the OpenDocument standard, and is maintained by The Document Foundation.
More in Productivity
AFFiNE
Productivity
Docs, whiteboards and databases in one workspace
AppFlowy
Productivity
Notes and wiki with local-first data
Baserow
Productivity
Online database with a spreadsheet-style interface
Cal.com
Productivity
Scheduling software for booking meetings
CryptPad
Productivity
End-to-end encrypted collaborative documents
Docmost
Productivity
Collaborative wiki and documentation