Polypane (Beta)

What it does

Polypane is a cross platform browser for responsive design, it shows your site in multiple dimensions all at once.

Polypane has everything a browser has, plus all the tools you need to build responsive, fast, accessible, and SEO-friendly websites and apps, with multi-viewport synchronised previews and accessibility tooling.

• 
  Polypane2019 · polypane.app · ▲192

  The browser for building great web experiences

• 
  A new browser for web developers and designers2019 · polypane.rocks · ▲10

  Polypane has everything a browser has, plus all the tools you need to build responsive, fast, accessible, and SEO-friendly websites and apps, with multi-viewport synchronised previews and accessibility tooling.

• WD
  Webflow - Design responsive websites visually2013 · playground.webflow.com · ▲503
• 
  Subframe2024 · subframe.com · ▲756

  The best way to build UI, fast

• 
  21st.dev2025 · 21st.dev · ▲1,211

  I originally built this app to organize and reuse interesting React + Tailwind components I came across on Twitter, inspired by the shadcn/ui approach. Later, a friend started contributing their own components, and it got me thinking—this could grow into something bigger, like an NPM for design engineers to share and use components. Would love to hear your thoughts!

• 
  Responsively2020 · responsively.app · ▲458

  Develop responsive web-apps 5x faster

• 
  /dev/null▲472

  a social network for devs

  Dev tools · 2d ago · dev-null.sh

• 
  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

• 
  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

• 
  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 22d ago · openbot.run

• 
  Talanoa▲340

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

• 
  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 27d ago · corespeed.io

• 
  Framer Design▲1,008

  Design, code and collaborate. Now all-in-one.

  Dev tools · 2017 · framer.com

• 
  Not Hotdog▲907

  An app that shows if your food is a hotdog 🌭

  Life & fun · 2017

• 
  Ludus Beta▲906

  A limitless presentation tool for designers.

  Work · 2017 · ludus.one

• 
  Startup Graveyard▲877

  History shouldn't have to repeat itself

  Life & fun · 2017 · startupgraveyard.io

• 
  Good Sales Emails▲813

  Best sales emails from great companies

  Growth · 2017 · goodsalesemails.com

• 
  Things 3.0▲757

  Complete revamp of the original, award-winning task manager

  Work · 2017 · culturedcode.com