Crabfarm lets you build web scrappers using TDD, it is also very opinionated about the way a scrapper should be structured. Scrappers created by crabfarm can be hosted and monitored in the Crabfarm grid infrastructure.

Capstone is a disassembly engine written by Nguyen Anh Quynh, available here https://github.com/aquynh/capstone. This is the Ruby FFI binding.

Useful Minecraft utilities

A Ruby library for the CrateDB HTTP interface with query support, DDL command and schema introspection shortcuts, and support for BLOB tables.

Ruby client for the Creditsafe SOAP API

Simple credit card number generator

Platform agnostic MD5 hash from simple data structures made of numbers, strings, booleans, nil, arrays or hashes.

Converts a crontab schedule into English text.

A builder DSL for generating cron intervals using a human readable English syntax

Dissect your Cron patterns!

A Ruby wrapper for Crunchbase API version 3.1

Ruby wrapper for Crunchbase API version 2

Cryptopia wrapper api

CryptoPunks GUI for Simplified Minting - Built with Glimmer DSL for Tk (requires ActiveTcl to run cryptopunks-gui command)

A safe Ruby encryption library, designed to support features likemultiple active encryption keys and key rotation

Cryptozoologist generates random strings from animal, clothing item, and color pairings. It's fun and silly, because who doesn't want an orange sloth turtleneck?

A ruby library for solving arbitrary constraint satisfaction problems. If the constraints can be specified in the ruby programming language, then this library can find a solution.

Helper for creating css class strings inspired by ReactJS classSet

Lint your CSS.

The CSSminify gem provides CSS compression using YUI compressor. Instead of wrapping around the Java or Javascript version of YUI compressor it uses a native Ruby port of the CSS engine. Therefore this gem has no dependencies.