Playroom – SDK for making multiplayer games in JavaScript

In plain words

Playroom is a software development kit that enables developers to create multiplayer games using JavaScript. Launched in August 2023, it provides tools and documentation for building games where multiple players can participate simultaneously. The SDK is designed for game developers who want to implement multiplayer functionality without building networking infrastructure from scratch. It simplifies the process of adding real-time multiplayer capabilities to JavaScript-based games.

written from the facts on this page · September 2026

• 
  Playbook2021 · ▲372

  Dropbox for creatives to see everything, find anything

• IB
  I built a multiplayer voxel browser game engine2023 · kevzettler.com · ▲236
• 
  Rooms.xyz BETA2023 · ▲273

  Create interactive rooms in your browser

• 
  Playbook2025 · ▲397

  Beautiful documentation your customers will love

• GC
  Gaming Couch – a local multiplayer party game platform for 8 playersDec 2025 · gamingcouch.com · ▲437

  Hi HN, I’ve been working on Gaming Couch, a web-based game platform where up to 8 players use their smartphones as controllers to play real-time action mini-games on a central browser screen. TL;DR: - 18 competitive mini-games for up to 8 players - Runs entirely in the browser - Phones act as controllers (no apps, no accounts required) - Focused on fast, chaotic, real-time party games (no trivia) - Currently in public early access Try it here: https://gamingcouch.com. Open the link on a computer, host a session, scan the QR code with your phone(s) and play! What is it? Gaming Couch…

• IS
  I spent two years working on an HTML5 game. I finally released it2012 · ektomarch.com · ▲515

• 
  Dograh▲592

  The open source VAPI alternative

  Dev tools · 25d ago · dograh.com

• 
  Meridian▲530

  Don't let your work go unnoticed. Get promoted!

  Dev tools · 20d ago · meridiona.com

• 
  x1▲516

  Lovable for iPhone apps go from idea to App Store

  Dev tools · 11d ago · x1.new

• 
  Computable GPU Index (CGI)▲424

  The first open-source price index for GPU compute

  Dev tools · 10d ago · getcomputable.com

• 
  Open-Source eInk Bike Computer▲402

  OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.

  Dev tools · 2d ago · opentrailpaper.com

• 
  The GTM Co-Founder▲402

  Open-source GTM skills for technical founders

  Dev tools · 29d ago · gtmcofounder.com

• 
  Resend▲1,326

  Email for developers

  Dev tools · 2023 · resend.com

• 
  STORI AI▲1,320

  Your ideas become visually compelling branded social posts

  AI · 2023 · storiai.com

• 
  Kombai▲1,080

  A new AI model that you can prompt with UI designs

  AI · 2023 · kombai.com

• 
  User Persona Generator▲1,014

  Understand your audience without 50 interviews

  AI · 2023 · founderpal.ai

• 
  Lottielab▲871

  Create and ship lottie animations to sites and apps faster

  Dev tools · 2023 · lottielab.com

• LC
  LLMs can generate valid JSON 100% of the time▲854

  Outlines is a Python library that focuses on text generation with large language models. Brandon and I are not LLM experts and started the project a few months ago because we wanted to understand better how the generation process works. Our original background is probabilistic, relational and symbolic programming. Recently we came up with a fast way to generate text that matches a regex (https://blog.normalcomputing.ai/posts/2023-07-27-regex-guide...). The basic idea is simple: regular expressions have an equivalent Deterministic-Finite Automaton (DFA) representation. We…

  AI · 2023 · github.com