What modernizer scripts exist for the new ECMAScript 5 functions?

Question

ECMAScript 5 has quite a few nice additions. John Resig has a good overview here. Here is a good ECMAScript 5 compatibility table.

A lot of this stuff can be \"fake

Answer 1

es5 - JavaScript/EcmaScript 5 in 3 is a collection shared at BitBucket. Object.create in particular is an easy one to fake, made popular by Crockford et al, but improved on here by Justin Love, focussing on many ES5 parts.