Etherpad: A modern really-real-time collaborative document editor.
翻译 - Etherpad：实时协作文档编辑器
A drop-in javascript spreadsheet library that provides rich features like Excel and Google Sheets
Online collaborative Whiteboard that is simple, free, easy to use and to deploy
翻译 - 简单，免费且易于使用的在线协作白板
SQLSync is a collaborative offline-first wrapper around SQLite. It is designed to synchronize web application state between users, devices, and the edge.
Interactive and collaborative code notebooks - made with Phoenix LiveView
翻译 - 交互式和协作式代码笔记本-用Phoenix LiveView制作。
🐙 OctoBase is the open-source database behind AFFiNE, local-first, yet collaborative. A light-weight, scalable, data engine written in Rust.
Some 'facts' about the arguably most prominent competitive programmer of all time.
翻译 - 关于可以说是有史以来最杰出的竞争程序员的一些“事实”。