UltraDevKit

What it does

All the dev tools you need in one Chrome extension. CSS Inspector, Screenshot, Responsive Preview, Web Scraper, and more.

29 dev tools in one Chrome extension: inspect CSS, audit accessibility, check WCAG contrast, measure Core Web Vitals and capture screenshots.

Inspect CSS, audit accessibility, check WCAG contrast, measure Core Web Vitals, pick colours, capture screenshots and preview responsive layouts — without leaving your browser. Edit any element's styles live with sliders, color pickers, and alignment controls. See changes instantly. Capture the visible area, full page scroll-stitch, or drag-to-select any region. One-click copy or download. Test your site on iPhone SE, iPhone 14, iPad, laptop, and desktop viewports without resizing your browser. Hover and click any element to extract structured data from the whole page. Export as JSON or CSV. Grab any color on the page with a precision eyedropper. Build and export palettes in one click. Get…from ultradevkit.com

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  Web Developer ToolsAug 2026 · webdevelopertools.dev · ▲3

  500+ web developer tools in one powerful Chrome extension

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  Chrome Developer Tool2014 · chromewebstore.google.com · ▲107

  Develop and Debug Chrome Apps & Extensions. By Google

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  SuperDev Pro2023 · ▲110

  Edit, inspect and enhance any website visually.

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  CSS Dig2014 · ▲129

  Consolidate and refactor your css with this chrome extension

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  Dev Links2023 · chromewebstore.google.com · ▲110

  All links a developer would need

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  Toolb.dev2021 · toolb.dev · ▲122

  A set of 50+ free interactive CSS, HTML and JS webtools

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  /dev/null▲484

  a social network for devs

  Dev tools · 3d ago · dev-null.sh

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  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 · 28d ago · github.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 · 26d ago · github.com

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  OpenBot▲362

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

  Dev tools · 23d ago · openbot.run

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  Talanoa▲346

  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

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  CoreSpeed▲332

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

  Dev tools · 28d ago · corespeed.io

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  Brew ▲900

  Like Claude design for email marketing

  AI · May 2026 · brew.new

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  Kilo Code for VS Code▲896

  Parallel agents, diff reviewer, and multi-model comparisons

  Dev tools · May 2026 · kilo.ai

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  StoreClaw▲806

  Grow your store profits with agents that know how to sell

  AI · May 2026 · storeclaw.ai

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  PollyReach▲795

  Give your agent a real number and voice to make calls.

  AI · May 2026 · pollyreach.ai

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  Needle: We Distilled Gemini Tool Calling into a 26M Model▲776

  Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…

  Life & fun · May 2026 · github.com

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  Files.md – Open-source alternative to Obsidian▲730

  🌱 Private, quiet space for thinking. Simple app for .md files. - zakirullin/files.md

  Dev tools · May 2026 · github.com