iUI is a mobile web framework that has been around for a long time (since 2007) compared to many other mobile resources.

It was mentioned in a previous WRD article (iPhone Application And Website Development: All Tools And Tutorials You Need) and evolved much since then.

The framework includes a JavaScript library, CSS and images for developing touch-enabled web apps.

User interfaces to be created are iPhone-like yet compatible with most smartphones and tablets and has support for menus, forms, lists, image galleries and more.

Also, there are built-in extensions for caching, getting system information, HTML5 videos or theme switching.

iUI is well-documented and has tutorials to get you started easily.

MobileESP is an open source project for easily detecting users browsing the web pages with a mobile browser.

It has server-side versions for PHP, ASP.NET, Java, Ruby and a client-side JavaScript version with light features.

There are methods provided for detecting a specific device (iPhone, Android, WebOS, etc.) or a wider selection if it is a smartphone, tablet, game console, etc.

The project has support for most of the well-known devices and can even identify their capabilities.

Jo is an open source mobile application framework that is based on HTML5 .

It enables you to create for multiple platforms like webOS, iOS, Android, Symbian, Safari, Chrome and Dashboard Widgets.

The framework is small in size, ~8kb, without any dependencies and compatible with many other JS frameworks.

Jo is also compatible with PhoneGap and makes possible to create native apps besides web apps.

It is very well-documented and has sample codes on every level.