An [office suite](https://en.wikipedia.org/wiki/List_of_office_suites) is a collection of productivity software usually containing at least a word processor, spreadsheet and a presentation program.
- [Collabora Online Development Edition](https://www.collaboraoffice.com/code) - Collabora Online Development Edition (CODE) is a powerful LibreOffice-based online office that supports all major document, spreadsheet and presentation file formats, which you can integrate in your own infrastructure. ([Source Code](https://cgit.freedesktop.org/libreoffice/online/)) `MPL-2.0``C++`
- [CryptPad](https://cryptpad.fr/) - CryptPad is a collaboration suite that is end-to-end-encrypted and open-source. It is built to enable collaboration, synchronizing changes to documents in real time. ([Source Code](https://github.com/xwiki-labs/cryptpad)) `AGPL-3.0``Nodejs`
- [EtherCalc](https://ethercalc.net/) - Web spreadsheet. ([Source Code](https://github.com/audreyt/ethercalc)) `CPAL-1.0/Artistic-2.0``Nodejs`