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.

MPL-2.0

C++

CryptPad

Collaboration suite built to enable collaboration, synchronizing changes to documents in real time.

AGPL-3.0

Nodejs

Digislides

Create multimedia presentations in a quick and easy way. (documentation in French).

AGPL-3.0

Nodejs

Etherpad

Highly customizable online editor providing collaborative editing in real-time.

Apache-2.0

Nodejs

Grist

Next-generation spreadsheet with relational structure, formula-based access control, and a portable, self-contained format (alternative to Airtable).

Apache-2.0

Nodejs