Easily reveal elements as they enter the viewport.
#animation
uilang
a minimal, ui-focused programming language for web designers
Dynamic Physics Animations
Create High-Performance Interactions for the Mobile Web
Bounce.js
bounce.js lets you create tasty CSS3 powered animations in no time.
Velocity.js
Velocity is a jQuery plugin that re-implements $.animate() to produce significantly greater performance (making Velocity also faster than CSS animation libraries) while including new features to improve animation workflow.
Framer – Prototyping Tool
A prototyping tool for animation and interaction on desktop and mobile.
favico.js
Make a use of your favicon with badges, images or videos
LICEcap
LICEcap can capture an area of your desktop and save it directly to .GIF (for viewing in web browsers, etc)
jquery-requestAnimationFrame
Replaces the standard jQuery timer loop with requestAnimationFrame where supported.
All you need to know about CSS Transitions
All you need to know about CSS Transitions
Nice primer on CSS3 animations from Alex.