Spider is yet another Ruby framework.

Strelka is a framework for creating and deploying Mongrel2 web applications in Ruby.

Synchronize attributes on a local ActiveRecord user model with the user metadata store on Auth0

open and free fx auto trade system.

Helps using uuid everywhere in routes instead of id for ActiveRecord models.

Basic tools for Heroku Vault's Ruby projects

This gem allows you to perform most of the available operations in the Windows Azure Service Management API from a friendly commandline tool.

An Active-Resource replacement that supports camel-cased APIs and HTTP caching, and avoids race conditions when changing authentication information on the fly.

Add a GUID to Active Record instances.

an RDF database for usage in ActiveRDF (based on sqlite3)

active_record_uuid is a nice gem that add uuid supports to your activerecord models (MySQL). It allows you to store uuid in various formats: binary (16 bytes), base64 (24 bytes), hexdigest (32 bytes), or string (36 bytes), and query back with uuid string.

UUID extension for ActiveRecord

activerecord_uuid_as_pk is a extension for ActiveRecord to enable to use uuid for id attribute.

Add binary (not string) UUIDs to ActiveRecord in PostgreSQL

Rails injectable Relationships (e.g. friendships) backed by Redis

Rails injectable Redis-backed activity stream system. This is an alpha release of code that I just wrote and put into production on 3/11/12. Send feedback and post bugs to the Github page, but use at your own risk!

With ActsAsSubscription, you can hook your model into several subscription services, such as CheddarGetter.

Allows for arbitrary permissions on arbitrary collections of objects, rather than system-wide role based management

This is a customized version of Ball Aerospace COSMOS, maintained by Visiona for the ADAMS project. Includes specific patches

Why this gem? The aim is to make mobile advertising and mobile user acquistion more flexible and cost effective. In a sense, this gem can help become your own mobile adnetwork aggregator by allowing you to easily try out new adnetworks without having to integrate their respective SDKs. The gem also provides the raw data for comparing the performance of adnetworks and allowing you to make informed choices.