Cartograph makes it easy to generate and convert JSON. It's intention is to be used for API clients.

Helpers for the CartoJSON specification

Ruby gem that wraps the car2go API -- only supports the public API at present

Ruby bindings for the Carve.io API.

All carwow's ruby projects will follow these rules

Highly customizable data parser with a lot of DI

Ruby wrapper for CaseBlocks API

If you're using Oracle or another DBMS that has case-insensitive collation sequences, and you don't want to litter your database access code with case conversions, this gem is for you.

Case sensitive for attributes

Ruby implementation of various financial analysis functions.

Casica API Ruby Wrapper

Client for CASS API

a ruby api client for the cassia router api

Simple structured object cache for ruby apps.

Gem to check cas ticket

Castor is a configuration management gem. It can help write configuration apis for other gems

See above.

Iugu Payments Integration with Catarse crowdfunding platform.

A gem that provides information on the most common cat breeds

Works like a simple tagging system, but instead of tags it has categories, and categories may have an ilimited level of subcategories.