jQ.Mobi is a fresh and open source JavaScript framework that focuses on providing a great experience on both of the dominant mobile operating systems with a tiny footprint and code efficiency.
qTip2 plugin can display the tooltip in any position wanted, plays nicely with image maps and they can be set to follow any element (handy for drag 'n' dropped and animated items) or mouse.
QuoJS is a micro, modular, Object-Oriented and concise JavaScript Library that simplifies HTML document traversing, event handling, and Ajax interactions for rapid mobile web development. It allows you to write powerful, flexible and cross-browser code with its elegant, well documented, and micro coherent API.