A Craigslist listings scraper.

Pure ruby implemented generic CRC (Cyclic Redundancy Check) calculator. Customization is posible for 1 to 64 bit width, any polynomials, and with/without bit reflection input/output. If you need more speed, please use crc-turbo.

A Ruby library for credit card BIN validation and brand identification

Unified interface for encrypted credentials and plain text file based

Simple credit card number generator

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

Test spy for any object. It makes mocks obsolete so you don't have to be worried about where to put the expectations (i.e. before or after the subject method).

Converts a crontab schedule into English text.

Dissect your Cron patterns!

This gem wraps fengyuanchen's cropper to be used inside Rails applications.

Gem to calculate the distance of a point to a segment on a great circle.

Wrapper for Crunchbase API v2

A Ruby wrapper for Crunchbase API version 3.1

Ruby wrapper for Crunchbase API version 2

Crypt is a pure-ruby implementation of a number of popular encryption algorithms. Block cyphers currently include Blowfish, GOST, IDEA, Rijndael (AES), and RC6. Cypher Block Chaining (CBC) has been implemented.

Cryptopia wrapper api

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

Simple encryption and decryption with asymmetric (or public-key) cryptography.

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?

Strong's Concordance resources for CSKit.