jquery.snipe (GitHub: RayFranco / jquery.snipe, License: Apache 2.0, Component:
RayFranco/jquery.snipe) by Franco Bouly shows a pleasing lens effect over images that follows the mouse. The "zoom" image is separate, so effects can be created -- Franco's examples have black and white images with a colour image for the zoom.
Note that Franco's example image is slightly risqué -- it's perfectly safe for work in the DailyJS office but it might not be elsewhere.
Photobooth.js (GitHub: WolframHempel / photobooth-js, License: BSD) by Wolfram Hempel is an API for working with webcams. It currently works in recent versions of Chrome, Firefox, and Opera -- browsers that support
navigator.getUserMedia. It can be used like a class or through jQuery. It supports hue, saturation, and brightness adjustments and image resizing.
The map service used is Here from Nokia.