10 excellent Web UI libraries/frameworks

1. IT Mill Toolkit
IT Mill Toolkit is an open source Web UI framework that provides widgets and tools for rich Web applications. No need to worry about compatibility issues with web browsers, DOM, and JavaScript.

2. LivePipe UI
LivePipe UI is a series of high-quality Web 2.0 widgets and controls applications built on the Prototype JavaScript framework. Each application has been properly tested and has high scalability. The complete documentation can help you better learn to use this Web UI framework.

3. Iwebkit iPhone/iPod touch framework
Iwebkit helps you create a high-quality iPhone and iPod touch website in a few minutes, and it is widely used.

4. Jitsu
Jitsu includes a complete set of tools to help developers build and deploy sophisticated user interfaces. It also includes XML markup language, page compiler, data binding, JavaScript runtime, control library, runtime inspector, animation engine, cross-platform library, Ajax and back button, etc.

5. MochaUI
MochaUI is a Web UI library based on the Mootools JavaScript framework. It includes: Web applications, Web desktops, Web website development, widgets, forms, semantics and other functions.

6. Echo Web Framework
Echo is an open source framework for developing rich web applications. The goal is to make Web client applications close to desktop applications.

The current latest version is Echo3: 3.0 beta7. Detailed documentation can be obtained through the official website http://echo.nextapp.com/site/.

7. The Yahoo! User Interface Library (YUI)
The YUI Library I believe everyone is familiar with this library, which is written in JavaScript and aims to build more complete Web interactive applications. Including DOM scripting, DHTML, AJAX and other technologies. YUI is free for all users based on the BSD license.

8. Sigma Ajax UI builder
SigmaVisual is written in JavaScript and PHP. It is a visual AJAX UI creation tool. Developers can use SigmaVisual to save time and improve efficiency in the process of building prototypes and real web applications.

9. WUI Web UI Framework
WUI (Web User Interface) Web user interface is an MVC framework written in Java.

10. Butterfly Web UI
Compared with other Web UI frameworks, Butterfly Web UI has the advantage of well integrating Butterfly DI Container, which helps you build and reduce the use of internal components in Web applications and optimize the structure.