Awesome Dev Utilities is a curated collection of free, fast, and no-login online developer tools from LoopPlunk. It includes everyday utilities like SQL formatters, cron expression helpers, UUID and QR code generators, unit converters, text tools, and developer cheat sheets — all designed to save time and simplify common development tasks.

🗂️ A full-stack developer tool to save, search, and reuse code snippets — built with FastAPI, React, and SQLite.

Built for development and testing;QR-based LAN chat & file transfer. No install. Fast text/image/file sharing across devices. macOS/Windows Support.

In Google Colab, cell IDs (the unique identifiers for each code or text cell) can change when you add, delete, or reorder cells. This often leads to broken anchor links in your Table of Contents, making it difficult to navigate within your notebook. This tool was developed to solve this problem by generating stable,

Simulation environment for testing and validating autonomous agents

A curated collection of free online tools to boost productivity, optimize websites, and enhance SEO.

Clarity developer toolkit — safe math, SIP-010 helpers, token validation, basis points — used in production mainnet contracts

HookRadar — Free & open-source webhook tester, debugger & inspector. Real-time monitoring, payload analysis, request replay, cURL export. Self-hosted alternative to Webhook.site & RequestBin.

Russian Business Data Generator

A community catalog of autonomous agents and bundles certified by passing TraceCore deterministic episode runs in public CI

ComplyC is a configurable coding-guideline compliance engine for safety-critical embedded C. It analyzes source code using Clang AST, detects rule violations, enforces style standards, and generates clear compliance reports for automotive and embedded software teams.

Per-prompt token analytics for Claude Code. See exactly which prompt consumed what, why it was expensive, and how your context window fills up.

GitGauge — Chrome extension that scores GitHub repository authenticity from stars/forks/watchers/issues ratios.

实战型开发教程与可运行代码示例库：Backend/Frontend/DB/AI/LLM/Cloud，一知识点一示例，能跑能学能用。

Local-first CLI for mocking HTTP APIs with YAML, JSON, and CSV-backed datasets

Stop AI from creating duplicate React components. A Claude Code, Kiro starter template with a component registry, pre-commit duplicate detection, and CLAUDE.md guardrails that force AI assistants to reuse what already exists.

QAstro.js is a modular library for automatic accessibility and security linting of web pages. Easily extensible with new rules

ByteKit: 17 free browser-based developer tools — JSON Formatter, CSS/JS/HTML Formatter & Minifier, Regex Tester, JWT Decoder, Base64, Hash Generator, Color Converter, URL Encoder, Markdown. No login, no tracking.

AI-powered VS Code extension using local Ollama models for inline code completion — a free GitHub Copilot alternative

Chrome extension for clearing cookies, storage, and permissions with one click.