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Life & fun · alternatives · 2026

24 alternatives to I saw this mind-blowing experiment, so I made a simple version of it

Two browser windows (acting as socket clients) communicate their: - Screen dimensions - (screen.width, screen.height) - Window dimensions - (window.innerWidth, window.innerHeight) - Window X/Y position - (window.screenX, window.screenY) ...or whichever calculation works best for you. The original work by Bjorn Staal https://twitter.com/_nonfigurativ_/status/172732259457002734 used localStorage, but I found sockets more fun, because if tweaked a bit, this can be shared with friends. Here's a demo of how it works and the codebase:…

This project enables two browser windows to communicate and share their screen and window dimensions, positions, and sizes through socket connections. It uses WebSocket technology instead of localStorage, allowing the… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 2 we have checked on their own sites, 2 of them free or with a free tier. I saw this mind-blowing experiment, so I made a simple version of it launched in 2023; newer entries below may have overtaken it.

  1. 1

    Seeing all the hype around Bolt.new, I decided to give it a try, and within just 30 minutes, I built a fully functional web app for screen sharing. How It Works: - One user opens a room and receives a unique code. - Participants join by simply entering the code to view the shared screen. After that initial build, I moved the project to Cursor to continue iterating and enhancing its features. Github: https://github.com/tonghohin/screen-sharing Demo: https://share-your-screen.vercel.app

    2024 · github.com · its alternatives →

  2. 2
    Here▲304

    Hang out and collaborate over video on a real-time canvas

    2020 · here.fm · its alternatives →

  3. 3MD

    Good to be back on HN with all-new CoScreen, a little more than 3 years after it launched over here! With CoScreen 5.0, you can now share your windows from multiple displays at the same time, a long standing request by our most avid users and impossible in other apps. It also has a lightning-fast, Rust-based window compositing, scaling, and streaming engine now. CoScreen was always meant to be different so that you and your team can share your screens simultaneously and multi-directionally, and to be able to control what is being shared. We saw it as a natural extension and closely coupled…

    2023 · blog.coscreen.co · its alternatives →

  4. 4

    Bring your team closer to you. One click to share and remote control any window. Get things done together like never before.

    2019 · coscreen.co · its alternatives →

  5. 5

    Work together like you’re in the same room. Supports Mac, Windows, Linux, iOS, Android, Safari, Firefox & Chrome.

    2020 · screen.so · its alternatives →

  6. 6

    The next best thing to working in the same room

    2017 · slack.com · its alternatives →

  7. 7

    Free screen sharing using Screenleap. The fast, simple, and free way to share your screen instantly for online meetings, sales demos, and collaboration.

    2012 · screenleap.com · its alternatives →

  8. 8

    Mirror a portion of your screen to a virtual monitor for easier screen sharing. - splitbrain/clipscreen

    2024 · github.com · its alternatives →

  9. 9

    View multiple screen dimensions in one view

    2019 · chromewebstore.google.com · its alternatives →

  10. 10

    CLI Native WebRTC Agent in Rust. Contribute to bitwhip/bitwhip development by creating an account on GitHub.

    2024 · github.com · its alternatives →

  11. 11

    Hi HN! https://flat.social is a web video meeting app for organising fun online meetings & social events. Each participant can move around and talk with others in their proximity. Here is a quick demo if you wanna see it in action: https://youtu.be/Y2yH3twjrx4 I’ve been on it solo for around a year right now. Tech used is Next.js, Typescript, PIXI.js on the front-end and Node, Mediasoup, Socket.io and Matter.js (physics engine) on the backend. Feel free to jump in into the demo room (https://flat.social/f/Flat.Social-Demo) to say hi, I’ll be…

    2022 · flat.social · its alternatives →

  12. 12
    Raybeam▲209

    Problem A few years ago I got my first ultra-wide monitor. It was a 49" Samsung monitor. I work as a software engineer, and in my line of work I need to screen share a lot. This almost immediately became a problem due to the size of the monitor. I would either need to get a second display just for screen sharing, share one window at a time (which required me to constantly stop/start sharing to select the new window), or share my entire screen making it difficult for other participants in the call to see what I'm doing due to the size of my display. I wanted a solution to this. At the…

    May 2026 · raybeam.live · its alternatives →

  13. 13

    Easy communication between cross-origin browser tabs. Simplified "CORS"ing! - wingify/across-tabs

    2017 · github.com · its alternatives →

  14. 14

    Browse any website together without screen sharing

    2023 · kaostogel2d.com · its alternatives →

  15. 15

    Side Space is an AI-powered browser extension for managing tabs in a vertical side panel. Side Space is a browser extension designed to help users organize and manage their open tabs more efficiently. It adds a vertical tabs manager to your browser’s side panel, making it easier to categorize, group, and switch between tabs for work, life, hobbies, and more. Key features include: • Vertical Spaces: Organize tabs into separate spaces (like work, shopping, or school) for better focus. • AI-Powered Grouping: Automatically group tabs using AI, or by domain, to reduce clutter. • Cloud Sync: Sync…

    2024 · sidecopilot.com · its alternatives →

  16. 16IM

    I've posted this game here before, hopefully a repost is fine as the game has changed quite a bit (improved AI, improved mapeditor, much quicker gameplay, etc). Game is based on JavaScript/Canvas and WebSockets. On the browser side the map is pre-rendered (as a background image), just the mobile units/buildings and animations are dynamically rendered. The lobby server is made in node.js, but the game server is C++ for performance reasons (mainly the pathfinding). I found the C++ WebSocket libraries out there to be too difficult to use so I made my own based on the rfc. Overall I…

    2022 · battle-of-flags.com · its alternatives →

  17. 17

    Easily wrap screenshots in different browser frames.

    2016 · browserframe.com · its alternatives →

  18. 18

    The world's fastest screen sharing & collaboration tool

    2021 · coscreen.co · its alternatives →

  19. 19
    Layer▲175

    Making your browser multiplayer

    2023 · layer.app · its alternatives →

  20. 20

    Anonymous aggregate viewport statistics from ScreenSize.net browser sessions, with recent viewport, device pixel ratio and browser distributions.

    Sep 2026 · screensize.net · its alternatives →

  21. 21

    Show your macOS desktop on FaceTime

    2018 · tryscreentime.com · its alternatives →

  22. 22

    Mirror part of your screen to a window for precise control

    2025 · apps.apple.com · its alternatives →

  23. 23

    I wanted to surf the 'net with my girlfriend, so I built this.

    2011 · chrome.google.com · its alternatives →

  24. 24

    Easily communicate among browser tabs

    2017 · engineering.wingify.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →