when
A lightweight Promises/A+ and when() implementation, plus other async goodies.
curl-amd
curl.js is small, fast, extensible module loader that handles AMD, CommonJS Modules/1.1, CSS, HTML/text, and legacy scripts.
shim
shim.js is the a collection of UMD modules that shim (aka "polyfill") old environments to support modern (aka "ES5-ish" and "ES6-ish") javascript.
cram
An AMD-compatible build tool.