Javascript libraries for dealing with touch events, multitouch, normalizing across the Webkit/IE touch models, and all that jazz.

• dojo/touch - Dojo detection functions for touch events

• jquery.doubletap - Custom touch events for jQuery. Demo.
• Touchy - Highly configurable jQuery plugin. Exposes event data (velocity, etc) for longpress, drag, pinch, rotate, swipe. Example use cases: prevent conflict between drag and swipe; get pinch abstracted across Android and iOS; create a single finger rotation.
• jQuery UI Interactions - Rewrite of the existing jQuery UI interactions, now with mouse, touche and pointer (aka MSPointer) support. Work in progress, but draggable already works great for all three event APIs.
• jquery-ui-touch-punch - A duck punch for adding touch events to jQuery UI
• pep.jquery.js - A lightweight plugin for kinetic-drag on mobile & desktop
• jQuery.event.move - jQuery special events movestart, move and moveend for tracking touch and mouse moves, throttled to browser animation frames, and exposing information about distance and velocity of fingers. Demo at stephband.info/jquery.event.move/.
• jQuery.event.swipe - jQuery special events for the gestures swipeleft, swiperight, swipeup and swipedown, built on top of jQuery.event.move. Demo at stephband.info/jquery.event.swipe/.
• jQuery Mobile vmouse - from the jQuery Mobile team. Supports normalized handling of mouse and touch events under one event convention: vclick, vmousedown, vmouseup, vmousemove, etc.
• Touchable - Unifies touch and mouse events
• http://jgestures.codeplex.com/
• http://labs.skinkers.com/touchSwipe/
• TipTap: normalizes mouse and touch events, and provides simple definition of complex gestures (any combination of tap, swipe, etc.) with simple callbacks.
• jQuery Touch Gestures: Touch Gestures ported and fixed from QUOjs project. Available gestures: singleTap | doubleTap | hold | swipe | swiping | swipeLeft | swipeRight | swipeUp | swipeDown | rotate | rotating | rotateLeft | rotateRight | pinch | pinching | pinchIn | pinchOut | drag | dragLeft | dragRight | dragUp | dragDown

• mootools-mobile - Wraps click handlers with touch and provides some custom events.

• YUI 3 touch abstraction - support for subscribing to native touch and gesture events

• https://github.com/max-power/swipeslide - Provides iOS like swipe navigation. WebKit only.

• Event.js - Multi-touch events library, and abstractions.
• pointer.js - a pointer event polyfill.
• jsTouchLayer - A javascript based touch events library, agnostic of any javascript libraries. Missing pinch/spread atm.
• interact - abstracted mouse and touch events into generic pointer events. Uses eve under the hood.
• tap.js - A lightweight 'tap' event JavaScript plugin for mobile browsers (no dependencies)
• tappable - A simple, standalone library to invoke the tap event for touch-friendly web browsers.
• Touchy - Lightweight (no dependencies) multi-touch, models individual fingers
• Touch - Simple library, enables touch events, such as: swipe, pinch and tap.
• thumbsjs - from the PhoneGap team. Heavily tested on many devices. Mature.
• touch-layer - Custom events and gestures handler for touch enable mobile devices.
• WKTouch - Hardware accelerated multi-touch drag, scale and rotate plugin for Mobile Webkit.
• MagicTouch.js - Standards-compatible touch event polyfill to map trackpad touches to touch events. Uses NPAPI plugin.
• Hammer.js - Lightweight library for multi-touch gestures

• Hammer.js - A javascript library (only 2kb) for multi-touch gestures: Tap, Drag, Pinch, Hold
• Ember-Touch - A lightweight library for building and using touch gestures with Ember Applications.
• Jester - Easy JavaScript gesture recognition for iPhone and iPad.
• Mobile-Web-based-Gesture-Recognition - Based on Dollar. Demo.
• shake.js - A custom 'shake' event plugin for mobile web browsers using device accelerometer. (Okay, not strictly touch, but it does require you to use your hand :P)
• dojox/gesture - Dojo detection functions for gesture events
• ZingTouch - Gesture detection library written in ES6. Comes with default gestures, but has the ability to extend and create new ones.

• TouchScroll
• iScroll
• Scrollability
• Overthrow
• AntiScroll
• Droid Scroll Emulation
• jQuery Overscroll
• Zynga Scroller

• FastClick
• FastButton
• energize.js
• Lightning Touch

• phantom limb - make desktop browsers simulate touch events. with a big hand
• touche

• Swipe JS - carousel (aka slider) component that is touch friendly
• Swiper - mobile touch slider with hardware accelerated transitions
• jQuery Mobile Pagination - touch-drag pagination between separate HTML documents or jQuery Mobile "pages"
• wkslider - A touch–optimised UI range slider JavaScript plugin (no dependencies)

• Creating Responsive HTML5 Touch Interfaces (Stephen Woods, Flickr)
• [Google I/O 2013 - Point, Click, Tap, Touch - Building Multi-Device Web Interfaces] (http://www.youtube.com/watch?v=DujfpXOKUp8) - Slides
• Getting Touchy Feely with the Mobile Web - Andrew Fisher (8 Aug 2012)
• Mark Dalgleish - Embracing Touch: Cross Platform Scrolling (8 Mar 2013)