Top 3 screenshare open source projects

Live Helper Chat - live support for your website. Featuring web and mobile apps, Voice & Video & ScreenShare. Supports Telegram, Twilio (whatsapp), Facebook messenger including building a bot.

Syntax sugar of OpenTok iOS SDK with Audio/Video communication including screen sharing

Source code for https://speaker.app, a batteries-included, web-based, quasi-decentralized, WebRTC networking platform, with a primary focus on audio and screen-sharing, and a secondary focus on chat messages and peripheral features.