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Top 23 JavaScript developer-tool Projects
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Project mention: Deep Dive: How Bruno 1.0 Stores API Tests Locally vs. Postman 11.0 Cloud Sync | dev.to | 2026-04-28
After 6 months of benchmarking, case study analysis, and real-world testing, our recommendation is clear: choose Bruno 1.0 if you are an engineering team that values performance, Git integration, and zero vendor lock-in. Our data shows Bruno outperforms Postman 11.0 in every local storage metric: 400ms faster startup for 1000+ test suites, 6x lower storage overhead per test, and zero sync latency. The case study above shows teams can save $2k+ per year in licensing costs and $18k+ per year in engineering time by switching to Bruno. For teams with heavy non-technical collaboration needs, or very small test suites (<100 tests), Postman 11.0’s free tier remains a viable option, but we recommend exporting collections to Bruno for all engineering use cases. The API testing landscape is shifting toward local-first tools to avoid cloud vendor lock-in, and Bruno 1.0 is leading that charge. Try Bruno today: download it from https://github.com/usebruno/bruno, and migrate your Postman collections in minutes using the native import tool.
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Project mention: Preact vs Astro 4: The Performance Battle benchmark in High-Scale | dev.to | 2026-05-07
High-scale performance gains are only valid if you test with realistic workloads that match your production traffic. Too many teams benchmark with 10 components on a fast WiFi network, then wonder why their app crashes under 1M DAU. Use the benchmark script we provided earlier to test with 10k+ components, throttled networks (3G, 4G, slow WiFi), and realistic concurrency (100+ req/s). Test both client-side and server-side metrics: TTI, FCP, LCP for client metrics; p99 latency, requests per second, memory usage for server metrics. For Astro apps, benchmark both SSG and SSR modes: SSG will always be faster for static content, but SSR is necessary for personalized content (e.g., logged-in user dashboards). Use Lighthouse CI to automate performance regression testing in your CI pipeline: set thresholds for LCP (<2.5s), FCP (<1.8s), and TTI (<3.8s) and fail builds that exceed them. In our case study, the e-commerce team caught a 400ms TTI regression before deploying by adding Lighthouse CI to their GitHub Actions pipeline, saving hours of debugging post-deployment. For cost benchmarking, use the AWS Pricing Calculator or Vercel’s cost estimator to project server costs for your traffic levels, as Astro’s lower resource usage can lead to significant savings at scale.
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react-proto
:art: React application prototyping tool for developers and designers :building_construction:
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playwright-skill
Claude Code Skill for browser automation with Playwright. Model-invoked - Claude autonomously writes and executes custom automation for testing and validation.
Project mention: I Tried and Failed to Rebuild the 1996 Space Jam Website with Claude | news.ycombinator.com | 2025-12-07Just use Playwright Skill (https://github.com/lackeyjb/playwright-skill). It is a game changer. Otherwise it is Claude the Blind, as OP mentioned.
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pro-workflow
Claude Code learns from your corrections: self-correcting memory that compounds over 50+ sessions. Context engineering, parallel worktrees, agent teams, and 17 battle-tested skills.
Project mention: Stop Rebuilding Your Claude Code Setup - Scaffold It Once with Worclaude | dev.to | 2026-04-16The workflow draws from Boris Cherny's tips (creator of Claude Code at Anthropic), patterns from Affaan Mir's everything-claude-code (Anthropic hackathon winner), Karpathy's coding principles, and community repos like pro-workflow.
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pythagora
Generate automated tests for your Node.js app via LLMs without developers having to write a single line of code.
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zeroshot
Your autonomous engineering team in a CLI. Point Zeroshot at an issue, walk away, and return to production-grade code. Supports Claude Code, OpenAI Codex, OpenCode, and Gemini CLI.
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ethora
SDK monorepo for Ethora chat / messaging platform. (1) Pick an SDK for your frontend stack. (2) Integrate manually or using ethora-setup. (3) Optionally configure app settings, deploy AI agents etc. Server: ethora.com cloud [free]. Dedicated server + SLA option for enterprise customers.
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Lynkr
Streamline your workflow with Lynkr, a CLI tool that acts as an HTTP proxy for efficient code interactions using Claude Code CLI.
Project mention: LiteLLM vs Lynkr for AI Coding Workflows: Where the Token Savings Actually Come From | dev.to | 2026-06-10I built Lynkr, so take this as a founder comparison. I’ll keep it honest: LiteLLM is a solid provider abstraction layer. But if your goal is specifically to reduce spend in Claude Code, Cursor, or Codex-style workflows, the difference is not “which gateway supports more providers.” The difference is whether the gateway cuts tokens before they reach the model.
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LLMFeeder
Brower extension to convert web pages to clean Markdown and copy to clipboard so you can feed it to your favorite LLM model as context with just 1 click!
Project mention: Show HN: LLMFeeder – Multi-tab web to Markdown for LLM context (v2.1.0) | news.ycombinator.com | 2026-02-16Everything still runs 100% client-side with zero tracking. The extension has grown to 1,000+ Chrome users and 200+ Firefox users.
Tech stack: Mozilla Readability.js for content extraction, Turndown.js for Markdown conversion, and JSZip for multi-tab archives.
Links:
- GitHub: https://github.com/jatinkrmalik/LLMFeeder
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
JavaScript developer-tools discussion
JavaScript developer-tools related posts
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Stop Telling Claude to 'Be Careful': Reinforcing It from the Outside with 3 Tools
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I made AI agents think Architecturally
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Accguard – authorization regression testing for APIs
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Stop Asking AI Agents to Guess How Your Repo Works
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How Topogram models delivery as an SDLC graph
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Topogram’s structured graph: concept and implementation
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My first post scored 1. Karpathy's autoresearch idea helped me repost
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A note from our sponsor - SaaSHub
www.saashub.com | 11 Jun 2026
Index
What are some of the best open-source developer-tool projects in JavaScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | bruno | 44,710 |
| 2 | lighthouse ci action | 30,320 |
| 3 | eruda | 21,029 |
| 4 | heynote | 5,304 |
| 5 | reactivesearch | 4,920 |
| 6 | cml | 4,177 |
| 7 | Boop | 4,125 |
| 8 | react-proto | 3,455 |
| 9 | React-Sight | 2,867 |
| 10 | playwright-skill | 2,754 |
| 11 | pro-workflow | 1,907 |
| 12 | workly | 1,880 |
| 13 | pythagora | 1,821 |
| 14 | zeroshot | 1,495 |
| 15 | documind | 1,474 |
| 16 | solhint | 1,125 |
| 17 | elm-live | 1,067 |
| 18 | webDevsCom | 720 |
| 19 | httptoolkit-server | 551 |
| 20 | ethora | 536 |
| 21 | find | 478 |
| 22 | Lynkr | 447 |
| 23 | LLMFeeder | 419 |
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