jQuery Mobile is a mobile web development framework designed for touchscreen devices. It provides broad support across Apple iOS, Android, Windows Phone, Blackberry, and other platforms. Key features include AJAX page loading, responsive and adaptive layouts, and core functionality that works well for touch interfaces on small screens. Popular sites that use jQuery Mobile include Disney, Open Table, Ikea, and various media companies. The framework includes widgets, themes, and supports building basic mobile web experiences on a wide range of devices.