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

The mdtranslator was written by the Alaska Data Integration Working Group (ADIwg) to assist with creating ISO 19139 metadata records. Input to the mdtranslator is JSON conforming to the mdJson-schema. The mdtranslator architecture allows developers to write additional readers for other input fo...

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 a...

Ruby implementation of the Alchemy micro-service framework

Your Friendly Continuous Integration server. Easy, fun and painless!

Part of the AMEEappkit this gem provides a data abstraction layer, decreasing the amount and detail of development required

simple command and control based on redis

External access to your services on AppFog via a Caldecott HTTP tunnel.

Ardm fork of dm-types

Argos (http://www.argos-system.org/) webservice client and Argos legacy file (DS/DAT and DIAG/DIA) parser.

AnotherService.com CLI

asciidoctor-csand lets you write CSA Normal Documents (CSAND) in AsciiDoc syntax. This gem is in active development.