es-set
An ES-spec-compliant Set shim/polyfill/replacement that works as far down as ES3
es-map
An ES-spec-compliant Map shim/polyfill/replacement that works as far down as ES3
date
ES spec-compliant `Date` shim/polyfill/replacement that works as far down as ES3
es-arraybuffer-base64
An ES-spec-compliant shim/polyfill/replacement for ArrayBuffer base64 methods that works as far down as ES3