Utility-belt to build form data request bodies. Provides support for
`application/x-www-form-urlencoded` and `multipart/form-data` types.

Ruby FFI bindings for llhttp.

Support for the File Transfer Protocol.

Performant priority queue in pure ruby with support for changing priority
using pairing heap data structure.

Rake is a Make-like program implemented in Ruby. Tasks and dependencies are
specified in standard Ruby syntax.
Rake has the following features:
* Rakefiles (rake's version of Makefiles) are completely defined in standard
Ruby syntax.
No XML files to edit. No quirky Makefile syntax to worry about (is that a tab
or a space?)
* Users can specify tasks with prerequisites.
* Rake supports rule patterns to synthesize implicit tasks.
* Flexible FileLists that act like arrays but know about manipulating file
names and paths.
* Supports parallel execution of tasks.

RGL is a framework for graph data structures and algorithms.

BDD for Ruby.

RSpec extension gem for attribute matching.

RuboCop is a Ruby code style checking and code formatting tool.
It aims to enforce the community-driven Ruby Style Guide.

RuboCop's Node and NodePattern classes.

Ruby/NTLM provides message creator and parser for the NTLM authentication.

Module Stream defines an interface for external iterators.

vagrant-spec is a both a specification of how Vagrant and its various
components should behave as well as a library of testing helpers that let you
write your own unit and acceptance tests for Vagrant.

The library provides a set of helper methods in addition to RSpec matchers and
expectations to help you both unit test and acceptance test Vagrant
components. The RSpec components are built on top of the helper methods so
that the test library can be used with your test framework of choice, but the
entire tool is geared very heavily towards RSpec.