Etherpad
Self-hosted real-time collaborative editor with full authorship tracking and privacy control.
Etherpad is a real-time collaborative document editor designed for transparency and control. Every keystroke is attributed to its author, every revision is preserved, and a timeslider lets you scrub through the entire history character by character. It runs on your own server under your governance — no telemetry, no upsells, and AI is an optional plugin you control.