Semantic UI is an opensource CSS and JS based UI framework. Developed by Jack Lukic
License: Open Source
W2UI is a lightweight and fast framework focused on data manipulation with a rich set of UI components, making it ideal for applications that require extensive data handling. In contrast, Semantic UI offers a comprehensive library with responsive design and strong community support, making it suitable for a wider range of web applications, but it may be heavier and more complex for simpler projects.