JimLiu / baoyu-design

Run Claude Design locally as an Agent Skill — Cursor, Claude Code & more. Produce polished UI mockups, prototypes, decks & wireframes as self-contained HTML, without claude.ai/design. Best with Opus or Claude.

nock / nock

HTTP server mocking and expectations library for Node.js

evolus / pencil

The Pencil Project's unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use.

sinonjs / sinon

Test spies, stubs and mocks for JavaScript.

daimon3332 / address

A self-hosted address and synthetic test-profile generator for 27 countries and regions, built from real open-data streets, administrative areas, coordinates, and postcodes. Supports multilingual output, IP-nearby generation, map previews, and API access. 基于真实开放数据的自托管地址与合成测试资料生成器，覆盖 27 个国家和地区，支持多语言地址、IP 附近生成、地图预览与 API 调用

mountebank-testing / mountebank

Over the wire test doubles

jakerella / jquery-mockjax

The jQuery Mockjax Plugin provides a simple and extremely flexible interface for mocking or simulating ajax requests and responses

Kong / insomnia-mockbin

Insomnia Mockbin is the underlying backend for the API mocks capability of Insomnia. It is built and used by Kong, the author of the open-source Kong Gateway.

testdouble / testdouble.js

A minimal test double library for TDD with JavaScript

wheresrhys / fetch-mock

Mock http requests made using fetch

sunxin-ai / dsh-design-qa

Design-fidelity QA for DeepSeek Harness: lend any text-only model an eye, then judge whether the implementation matches the mock. Ships the benchmark behind that judgement — four fixtures, 23 injected defects, and every raw model transcript. Retires itself when DeepSeek ships vision.

maxswinkels / busybar-emulator

A faithful local emulator of the Flipper BUSY Bar: mock HTTP API and live LED display. Unofficial community project.

utkarsh1agarwal / claude-architect-exam-guide

Free study guide, learning material & 6 mock exams for Anthropic's Claude Certified Architect – Foundations (CCAF / CCAR-F) exam.

Damikk19 / gta6-fake-main-menu

Fanowska atrapa menu głównego GTA VI (Electron). To nie jest gra, nie zawiera żadnych grafik gry, wrzucasz własne w czasie działania.