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

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.

Create 💎 beautiful animations from boring screen recordings within ⏳ seconds

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

☀️ 机器学习零代码单元测试平台，零代码、全方位、自动化 测试 方法/函数 的正确性、可用性和性能。☀️ An unit testing platform powered by machine learning. Coding-free, comprehensive and automatic testing for methods/functions.

📽 A simple HTML mockup presentation engine for projects

Create beautiful screenshots with device mockups

Bootstrap Design Template — Assets Library — for Adobe XD

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

Instant iPhone X Mockup

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

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

DUMMY LOGO MAKER is an easy, fast and even fun way to create your own dummy logo for your projects. Use the composition of logo + isotype, only logo or only isotype. In addition, you can also your dummy logo in landscape and portrait mode.

Major stencil collections for Pencil

🏭 Liferay DXP / 7 Dummy data generation portlet

Generic Mockup Font used in MockFlow