ProcessWire is a free PHP open source CMS with a great API built to save you time and make development fun at any scale.

Webix UI is a JavaScript Library for cross-platform app development with HTML5 JavaScript widgets.

kodeWeave is a HTML/ CSS playground app.

Agile UI is a stand-alone framework that implements all the necessary components to build fully-featured and interractive user interface for your PHP applicat…

W2UI is a small JavaScript UI library with a complete set of widgets: layout, grid, sidebar, toolbar, tabs, fields, popup, utilities.