jQuery - The Write Less, Do More, JavaScript Library.
MotionDen - Free online animated video maker
Zepto.js - Zepto is a minimalist JavaScript library for modern browsers with a largely jQuery-compatible API.
Animaker - Animaker is an online do-it-yourself (#DIY) animation video maker that brings studio quality presentations within everyone's reach. Animated Videos, Done Right!
qooxdoo - qooxdoo is a universal JavaScript framework that enables you to create applications for a wide...
Rocketium - A DIY video creation platform. Make videos in minutes using preset themes and templates.