Dev tools · alternatives · 2026

Greenscreen is an open source digital signage system that displays content on screens via Chromecast. Designed for developers and organizations needing to manage displays, it provides a lightweight alternative to… 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 1 we have checked on their own sites, 1 of them free or with a free tier. Greenscreen, open source digital signage with Chromecast launched in 2014; newer entries below may have overtaken it.

1. 1
   Screenity▲878

   The most powerful screen recorder for Chrome

   2020 · chromewebstore.google.com · its alternatives →

2. 2
   Responsive Viewer▲393

   View multiple screen dimensions in one view

   2019 · chromewebstore.google.com · its alternatives →

3. 3BS
   BigScreen sends pictures and music from OS X to ChromeCast▲62

   2014 · roguesavant.com · its alternatives →

4. 4
   Chromebit▲281

   Turn any old monitor or TV into a computer

   2015 · amazon.com · its alternatives →

5. 5
   Control Chromecasts from Linux▲222

   📺 Control Chromecasts from Linux and D-Bus. Contribute to alexdelorenzo/cast_control development by creating an account on GitHub.

   2020 · github.com · its alternatives →

6. 6
   Lightpack▲255

   Ambient backlight synced to your TV or monitor

   2015 · lightpack.tv · its alternatives →

7. 7RA
   Rainbow – an attempt to display colour on a B&W monitor▲389

   2020 · anfractuosity.com · its alternatives →

8. 8
   Petal, open-source CoScreen/ScreenHero finally freefree▲228

   Low latency, high resolution screensharing and remote control. Free and open source, from the makers of CoScreen.

   9d ago · petal.live · its alternatives →

9. 9
   Green Screen ad blocker▲10

   Make your banners bloom

   2017 · chromewebstore.google.com · its alternatives →

10. 10
    Smartshot▲176

    The easiest way to capture, annotate, and share your screen

    2016 · its alternatives →

11. 11
    WebScreen▲15

    A hackable, open-source gadget for gamers, geeks & creators

    2025 · webscreen.cc · its alternatives →

12. 12
    Screenshot.Rocks: Open-source browser and mobile screenshot mockup tool▲91

    Create mobile or browser mockups from screenshots in seconds. Screenshot.rocks turns ordinary browser screenshots into beautiful mockups

    2023 · screenshot.rocks · its alternatives →

13. 13
    SPF▲97

    Mac app that lets you display a dark overlay over the screen

    2019 · github.com · its alternatives →

14. 14
    Signage Sync▲11

    Hi guys, I'm sharing something I've been tinkering on for a while: https://signagesync.app/ Like Google Chromecast, but "cast" to multiple screens at once. Create a playlist of auto-refreshing web pages, videos, and even live streams (but not supported on Windows). Also works with local network, e.g. http://192.168.../sales-dashboard It's still early (MVP), but already usable—and I'd love to hear your feedback. Tech stack: SvelteKit, WebSocket, Flutter (desktop)

    2025 · signagesync.app · its alternatives →

15. 15
    Nimbus Screenshot and Screencast▲97

    My favorite screenshot & annotation extension for Chrome

    2015 · chromewebstore.google.com · its alternatives →

16. 16
    Pagescreen▲104

    Track any website visual change. Effortless.

    2017 · pagescreen.io · its alternatives →

17. 17
    Lyst▲50

    Digital Signage Platform

    2025 · lyst.so · its alternatives →

18. 18
    PIXO Pixel▲95

    An open source IoT LED display.

    2018 · kickstarter.com · its alternatives →

19. 19SR
    Screen recording with JavaScript▲87

    2014 · mgechev.github.io · its alternatives →

20. 20
    Green Gallery - Green Screen▲4

    Replace banner ads with beautiful flowers and plants

    2017 · its alternatives →

21. 21
    DoCast▲89

    Chromecast from iPhone to TV

    2023 · apps.apple.com · its alternatives →

22. 22
    VidCast▲85

    Chromecast for the rest of the web

    2014 · vidcast.dabble.me · its alternatives →

23. 23
    ScreenCloud▲12

    A simple digital signage solution for any screen

    2015 · screencloud.com · its alternatives →

24. 24
    White Screen Digital▲21

    Solid colors, pranks, fake updates, screensavers & tools.

    2025 · whitescreen.digital · its alternatives →

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 →