WPScan is a black box WordPress vulnerability scanner.

Scenario-based WebSocket black-box testing

XapianDb is a ruby gem that combines features of nosql databases and fulltext indexing. It is based on Xapian, an efficient and powerful indexing library

Provides rake tasks for Xcode build

Zero configuration file watcher for Objective-C that runs tests, installs Pods each time you save a file

Fast XML to Ruby Hash converter

Provides a wrapper to generate XML sitemaps and sitemap indexes.

Extensible Metadata Platform (XMP) parser extracts metadata from JPEG and TIFF image files. It also supports parsing raw XML files containing XMP.

Transit marshalling for Ruby

Blazing-fast-cross-platform-monkey-patch-free string XOR. Yes, that means JRuby too.

A Ruby wrapper for accessing Yammer's REST API

Checks YAML files for correct syntax

YardJunk is structured logger/error validator plugin for YARD documentation gem.

Ruby bindings for yrs. Yrs "wires" is a Rust port of the Yjs framework.

Ruby bindings for Z3 Constraint Solver

Zabel, is a build cacher for Xcode, using Xcodeproj and MD5, to detect and cache products for targets.

Simple gem to integrate Zapier webhooks with a Ruby project.

Adds methods for getting a zodiac sign from any Date/Time object containing a date of birth, and can also extend ActiveRecord::Base adding some handy instance and class methods (for searching by a given zodiac sign and more).

While you have to provide the paragraphs, ZombieWriter will arrange the paragraphs into different articles for you to use and edit to your heart's content. You may choose between Machine Learning (Latent Semantic Analysis and k-means clustering) or Randomization.

A barcode and QR code library that works with regular Ruby (not just JRuby). This gem comes bundled with ZXing C++ (zxing-cpp) and interfaces with it using FFI. As such this gem works with most major Ruby distributions.