Honorable mentions

There are simply too many libraries out there to do them all justice within the scope of this book. Let's look at a few more libraries for functional programming in JavaScript.

Functional
- Possibly the first library for functional programming in JavaScript, Functional is a library that includes comprehensive higher-order function support as well as string lambdas
wu.js
- Especially prized for its curryable() function, wu.js library is a very nice Library for functional programming. It was the first library (that I know of) to implement lazy evaluation, getting the ball rolling for Bacon.js, Lazy.js and other libraries
- Yes, it is named after the infamous rap group Wu Tang Clan
sloth.js
- Very similar to the Lazy.js libraries, but much smaller
stream.js
- The stream.js library supports infinite streams and not much else
- Absolutely tiny in size
Lo-Dash.js
- As the name might imply, the lo-dash.js library was inspired by the underscore.js library
- Highly optimized
Sugar
- Sugar is a support library for functional programming techniques in JavaScript, like Underscore, but with some key differences in how it's implemented.
- Instead of doing _.pluck(myObjs, 'value') in Underscore, it's just myObjs.map('value') in Sugar. This means that it modifies native JavaScript objects, so there is a small risk of it not playing nicely with other libraries that do the same such as Prototype.
- Very good documentation, unit tests, analyzers, and more.
from.js
- A new functional library and LINQ (Language Integrated Query) engine for JavaScript that supports most of the same LINQ functions that .NET provides
- 100% lazy evaluation and supports lambda expressions
- Very young but documentation is excellent
JSLINQ
- Another functional LINQ engine for JavaScript
- Much older and more mature than from.js library
Boiler.js
- Another utility library that extends JavaScript's functional methods to more primitives: strings, numbers, objects, collections and arrays
Folktale
- Like the Bilby.js library, Folktale is another new library that implements the Fantasy Land specifications. And like its forefather, Folktale is also a collection of libraries for functional programming in JavaScript. It's very young but could have a bright future.
jQuery
- Surprised to see jQuery mentioned here? Although jQuery is not a tool used to perform functional programming, it nevertheless is functional itself. jQuery might be one of the most widely used libraries that has its roots in functional programming.
- The jQuery object is actually a monad. jQuery uses the monadic laws to enable method chaining:
```
$('#mydiv').fadeIn().css('left': 50).alert('hi!');
```

A full explanation of this can be found in , Functional and Object-oriented Programming in JavaScript.

And some of its methods are higher-order:

$('li').css('left': function(index){return index*50});

As of jQuery 1.8, the deferred.then parameter implements a functional concept known as Promises.
jQuery is an abstraction layer, mainly for the DOM. It's not a framework or a toolkit, just a way to use abstraction to increase code-reuse and reduce ugly code. And isn't that what functional programming is all about?