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

In plain words

Whiteboard is an open-source IDE designed for thoughtful software design. It is for software developers who want to contribute to or use an integrated development environment focused on design-first coding practices. The product is available as open-source code on GitHub, allowing developers to participate in its development and customize it for their needs.

written from the facts on this page · September 2026

• AO
  An open-source collaborative whiteboard2018 · wbo.openode.io · ▲185
• OF
  OurBoard – free and open source online whiteboard2021 · ourboard.io · ▲178
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  Visme Whiteboards2022 · visme.co · ▲266

  Bring big ideas to life and brainstorm in style

• WD
  Whiteboardfree – Developer Jobs at Companies That Don't Whiteboard2018 · whiteboardfree.com · ▲396
• 
  RealtimeBoard 3.02018 · miro.com · ▲569

  Enhanced whiteboard. Your guide to the future of teamwork

• 
  Ycode2021 · ycode.com · ▲306

  No-code web app builder where design meets function

• 
  Kilo Code for iOS and Android▲498

  Start coding agents, control sessions, review PRs. Anywhere.

  Dev tools · 22d ago · kilo.ai

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  Monospace from Directus▲443

  The governed API layer for every app, person, and agent

  Dev tools · 17d ago · monospace.io

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  Arcjet▲430

  Secure the AI agents you're building at runtime

  Dev tools · 17d ago · arcjet.com

• 
  Open-Source eInk Bike Computer▲421

  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 · 28d ago · opentrailpaper.com

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  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 · 6d ago · github.com

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  Modaal for Android▲312

  Modaal is a cross-platform native AI app builder that lets product people build and ship real iOS and Android apps with their own AI agent. Instead of one React Native codebase drawing the same screens on both phones, Modaal shares the logic, not the screens. Your agent writes re

  Dev tools · 29d ago · modaal.dev

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  An e-ink frame that hears birds and draws them as 1800s illustrations▲2,389

  E-ink bird frame for Raspberry Pi - real-time bird detection by audio, fully local AI, rendered as real, hand-cut 1800s bird illustrations. - arnegiacomo/fugleramme

  AI · 17d ago · github.com

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  What if the speed of light was 5 km/h?▲629

  Special relativity simulator in which light crawls along at a human speed, so Lorentz contraction, aberration and Doppler shift happen at walking pace.

  Life & fun · 23d ago · rivendell.dmitrybrant.com

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  Jev▲544

  Fast, structured AI decisions for software automation

  AI · 12d ago · console.typesafe.ai

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  Kilo Code for iOS and Android▲498

  Start coding agents, control sessions, review PRs. Anywhere.

  Dev tools · 22d ago · kilo.ai

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  AINA▲497

  Find your job search blind spots with an AI coach

  AI · 14d ago · aina-tech.io

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  Solid▲471

  Agents with their own computers, accounts, and budgets.

  AI · 12d ago · solid.tech