dm-svn allows you to store data in a Subversion repository, then sync that data to a DataMapper model (for example, to a relational database. Essentially, it allows you app quicker access to the Subversion data.

DelayedJob for use form within a Merb application

Localization (L10n) and Internationalization (i18n) support for the Merb MVC Framework

email => http post

Commandline interface and library to the Fox Scientific Paper Suite

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

A gem that provides a Single Sign On server

this is set of rails and datamapper plugins for setting up a little more advanced rails application then the default rails generator does. the focus is on security and privacy as well a complete restful xml support.

configuration for other ixtlan-xyz wth serializer, input-filter and cuba definition

collection of utilities for datamapper: optimistic get, conditional get, use-utc timestampt, tag model as immutable, etc

helper to use fast_gettext with datamapper/ixtlan

helper for managing users with login/password via local db or remote rest-services

This is a library I've developed for attachments, because I just don't like the others I've tried.

Add address fields to a DataMapper model. This includes optional validations, and additional DM types for ZipCode and PhoneNumber.

Sync content from a Subversion repository to a DataMapper model

Sends you an email when someone @replies you on twitter.

Delayed_job (or DJ) encapsulates the common pattern of asynchronously executing longer tasks in the background. It is a direct extraction from Shopify where the job table is responsible for a multitude of core tasks. This gem is jmcnevin's fork (http://github.com/jmcnevin/delayed_job).

Little library that encapsulates a (particular) standardised way of talking between a service and javascript. Probably not the best way of doing things, but it's been handy in a pinch.

Upload files in your Ruby applications, map them to a range of ORMs, store them on different backends.

Qwicky is a REALLY small wiki implementation using Sinatra, DataMapper and SQLite3.