mockup

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

Prototyping Tool For Vue Devs 适用于Vue的原型工具

Declarative wireframes for programmers, based on web technologies. Pull requests are welcome!

Create beautiful mobile & browser mockups from screenshots

Create 💎 beautiful animations from boring screen recordings within ⏳ seconds

HTML based interface mockups

mocker-api that creates mocks for REST APIs. It will be helpful when you try to test your application without the actual REST API server.

Takes screenshots of a webpage in different resolutions and automatically applies it to mockup templates.

☀️ 最先进、最省事、ROI 最高的单元测试，机器学习 零代码、全方位、自动化 测试 方法/函数，用户包含腾讯、快手、某 500 强巨头等 ☀️ The most advanced unit testing way powered by machine learning. Coding-free, comprehensive and automatic testing for methods/functions. Used by Tencent, Kwai, a Fortune 500 company, etc.

📽 A simple HTML mockup presentation engine for projects

Create beautiful screenshots with device mockups

Open source Canva with CLI/GUI, AI Agent, MCP for App Store and Play Store screenshots. Free alternative to AppScreens, AppLaunchpad and Previewed

A powerful tool for creating and managing versatile mock API environments.

📔 📚 A curated list of ways to take ✨ Awesome Website Screenshots 😍

Bootstrap Design Template — Assets Library — for Adobe XD

Engine which simulates your exact Dynamics 365/CRM instance locally including all of it's logic!

Instant iPhone X Mockup

Automatically generate product mockups at scale. Overlay designs onto t-shirt, hoodie, and other templates with precise positioning. Perfect for POD, e-commerce, and marketing.

🐯 Mockup/testing JDBC & MongoDB driver (or Chmeee's son on the Ringworld).

Major stencil collections for Pencil