Loaders

$script.js
ajile - Compatible with a wide range of modern and ancient browsers.
bootstrap
BravoJS
ControlJS
DeferJS - Contains also a jQuery specific version.
DominateJS
head.js
Helios Kernel - traditional include-way of declaring dependences (also features dynamic modules (un)loading and progress report)
html5-preloader
Hydra.js
includejs
jQI
JSL
LABjs
lazyload
LMD - Lazy Module Declaration. Tiny and flexible loader+builder
load.js
module.js - A module system for Javascript with optional automatic loading of dependencies
NBL.js
StealJS
wreq
yepnope.js
YUI 3: Get
yuno

AMD

These libraries conform to the AMD module definition.

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