Free and open-source office suite with advanced word processing, spreadsheets, presentations, vector graphics, math formula editor, and database tools.
Open-source suite for editing documents, spreadsheets, presentations, forms, and PDF files with co-editing modes, plugin support, AI assistant, and integration across 40+ platforms.
Calligra Suite is an office and graphic art suite by KDE. It contains applications for word processing, spreadsheets, presentation, vector graphics, and editing databases.
CryptPad is a private-by-design alternative to popular office tools and cloud services. All the content stored on CryptPad is encrypted before being sent, which means nobody can access your data unless you give them the keys.
Collaborative suite for email, calendar, file sharing, conferencing, and team chat, designed for privacy, GDPR compliance, and hosted in Switzerland.
Comments
Apache OpenOffice should not be on this list as it hasn't been updated for years, probably a decade or so... LibreOffice is the community continuation of the project after the acquisition from Apache that ended up nowhere.
And what to add instead?
I think Ksuite is good alternative.