CBS Sports' (now deprecated, but still available) v3 Fantasy Sports API has lots of useful data about your league that you need an API token to programatically access.

CCP

format/send CEF logs via API+syslog or client program

Cello is a framework that allows automate acceptance tests using page-object

Celluloid::IO based library to consume Server-Sent Events.

Asynchronously LISTEN for Postgresql NOTIFY messages with payloads and Do Something

A Ruby Gem for querying the US Census Bureau API

Wrapper Ruby para o serviço cepfacil.com.br

CLI tool for AWS Certificate Manager.

Validate an X509 certificate against its listed OCSP endpoint and/or a CRL.

Cesri es una Gema Ruby que permite consumir los servicios Web de Comprobantes Electrónicos del Servicio de Rentas Internas, para fines de la facturación electrónica en Ecuador. Esta versión soporta únicamente la nueva modalidad "OFFLINE" del SRI.

Cfdef is a tool to manage CloudFront.

A tool for disassembling Graal CFG files

Implements custom operations for CF calls

Cfn Camelizer

CloudWatch monitoring tool can query a cloudformation stack and return monitorable resources that can be placed into a config file. This config can then be used to generate a cloudformation stack to create and manage cloudwatch alarms.

CloudFormation status library

Cfoo: CloudFormation master

Ruby LibECP is a wrapper around LibECP, an elliptic-curve cryptography library for producing and verifying ECDSA signatures.

Access API endpoints via method chaining in Ruby.