folktale/monads.maybe

browser-side require() the node way

LiveScript is a language which compiles to JavaScript. It has a straightforward mapping to JavaScript and allows you to write expressive code devoid of repetitive boilerplate. While LiveScript adds many features to assist in functional style programming, it also has many improvements for object oriented and imperative programming.

TAP reporter for Hi-Five.

Minimal BDD test runner that plays along nicely with Browserify.

Verifications for Monad laws according to fantasy-land.

An API documentation generator for JavaScript.

Property-based testing library (à lá QuickCheck/ScalaCheck).